Canvas Tools

The 'Canvas Tools' palette provides the ability to select the current interactive tool active in the Canvas workspace. The palette also makes available all the available settings to currently active canvas workspace tool.

To set the active Canvas workspace tool select the corresponding tool icon button. The ability to quickly switch between different Canvas tools is provided by custom Keyboard Shortcuts.

The active canvas tool settings can be displayed or hidden by clicking the active canvas tool settings label below the canvas tool icon buttons.

Hand Tool=

Hand Tool.

The hand tool provides ways to interactively navigate the canvas view.

• Pan Canvas: Canvas view can be quickly panned by pressing and dragging the cursor in the Canvas Viewport area.

Zoom Tool

Zoom Tool.

The zoom tool provides ways to interactively zoom the canvas view.

• Drag Zoom: Canvas view can be quickly zoomed by dragging the cursor in the canvas viewport area. The current centre of the canvas view will be retained during zooming.

Paint Brush Tool

Paint Brush Tool.

The paint brush tool provides an interactive tool to manipulate the pixel colours of areas of the current Canvas layer. Brush stamps of the current tool colour will be produced at regular intervals on the current canvas layer based on the following settings:

Type

Four brush types are provides that produce different results when using the mouse to interact with the canvas view.

• Freeform: Clicking and dragging the mouse cursor in the canvas view will produce brush stamps under the mouse cursor at regular intervals as it is moved.
• Line: Clicking and dragging the mouse cursor between two points in the canvas view will produce a line comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced line to Horizontal or Vertical orientation.
• Rectangle: Clicking and dragging the mouse cursor between two points in the canvas view will produce a rectangle comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced rectangle to be a square.
• Oval: Clicking and dragging the mouse cursor between two points in the canvas view will produce an oval comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced rectangle to be a circle.

Flow

The flow level controls the transparency of each individual brush stamps. A flow level of 100% will provide a strong brush stroke, a lower flow level will provide a more natural fluid brush stroke.

Opacity

The opacity level controls transparency of the complete brush stroke. A opacity level lower than 100% provides maximum strength of the brush stroke, a lower opacity will not allow any element of a brush stoke to be above the specified opacity even if the same area is interacted with multiple times.

Radius

The radius control specifies the maximum radius of brush stamps in pixels. If a pressure sensitive input device is used and pressure sensitivity settings are active then the radius of brush stamps may be smaller than this specified radius.

Hardness

The hardness level controls the amount a brush stamp fades around it's edge. A hardness of 100% will mean no edge fading with happen. 0% hardness will produce a brush stamps opacity to fade from the completly way from centre to edge.

Spacing

The spacing level control specifies the spacing between brush stamps based on a brush stamps current radius. A level of 100% will cause no brush stamp overlapping, where as a low spacing level will cause brush to overlap more tightly.

Smoothing

When the freeform brush type is active this mode optional provides a smooth quadratic interpolation between the input cursors sample points.

Under normal operation this option is recommended to be active.

Pressure

If a pressure sensitive input device is being used such as a Wacom graphics tablet then these options allow the input pressure is dynamically affect the brush tool output. The following options are available:

• Disabled: Even if a pressure sensitive input device is available the pressure input will be ignored.
• Flow: The amount of pressure input is multiplies brush flow amount. The result is updated as each brush stamp is produced.
• Radius: The amount of pressure input is multiplies brush radius amount. The result is updated as each brush stamp is produced.
• Flow and Radius: Both the flow and radius amounts of the brush are both modified as specified above.

Behind

When this setting is active instead of the paint brush compositing pixel data on top of the current canvas layer the paint stroke will composited under the current layer data.

Eraser Brush Tool

Eraser Brush Tool.

The eraser brush tool provides an interactive tool to manipulate the pixel transparency of areas of the current canvas layer. Circular stamps of reduced opacity will be produced at regular intervals on the current canvas layer based on the following settings:

Type

Four brush types are provides that produce different results when using the mouse to interact with the canvas view.

Freeform

Clicking and dragging the mouse cursor in the canvas view will produce brush stamps under the mouse cursor at regular intervals as it is moved.

Line

Clicking and dragging the mouse cursor between two points in the canvas view will produce a line comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced line to Horizontal or Vertical orientation.

Rectangle

Clicking and dragging the mouse cursor between two points in the canvas view will produce a rectangle comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced rectangle to be a square.

Oval

Clicking and dragging the mouse cursor between two points in the canvas view will produce an oval comprising of brush stamps at regular intervals. A dashed line is provided during tool interaction to indicate where the output stamps will be produced. Holding the Shift key during tool interaction will snap the produced rectangle to be a circle.

Flow

The flow level controls the transparency of each individual brush stamps. A flow level of 100% will provide a strong brush stroke, a lower flow level will provide a more natural fluid brush stroke.

Opacity

The opacity level controls transparency of the complete brush stroke. A opacity level lower than 100% provides maximum strength of the brush stroke, a lower opacity will not allow any element of a brush stoke to be above the specified opacity even if the same area is interacted with multiple times.

Radius

The radius control specifies the maximum radius of brush stamps in pixels. If a pressure sensitive input device is used and pressure sensitivity settings are active then the radius of brush stamps may be smaller than this specified radius.

Hardness

The hardness level controls the amount a brush stamp fades around it's edge. A hardness of 100% will mean no edge fading with happen. 0% hardness will produce a brush stamps opacity to fade from the completly way from centre to edge.

Spacing

The spacing level control specifies the spacing between brush stamps based on a brush stamps current radius. A level of 100% will cause no brush stamp overlapping, where as a low spacing level will cause brush to overlap more tightly.

Smoothing

When the freeform brush type is active this mode optional provides a smooth quadratic interpolation between the input cursors sample points.

Under normal operation this option is recommended to be active.

Pressure

If a pressure sensitive input device is being used such as a Wacom graphics tablet then these options allow the input pressure is dynamically affect the brush tool output. The following options are available:

Disabled

Even if a pressure sensitive input device is available the pressure input will be ignored.

Flow

The amount of pressure input is multiplies brush flow amount. The result is updated as each brush stamp is produced.

Radius

The amount of pressure input is multiplies brush radius amount. The result is updated as each brush stamp is produced.

Flow and Radius

Both the flow and radius amounts of the brush are both modified as specified above.

Fill Bucket Tool

Fill Bucket Tool.

The fill bucket tool will flood areas of the current canvas layer of similar colours with the current canvas tool colour radiating from a selected seed point. The seed point of the colour fill is specified by clicking the mouse cursor on a point of the canvas view. The result of this tool can be controlled using the following settings:

Tolerance

The percentage level that controls the level of difference from the point selected on the current canvas layer that will be flooded with the tool. A value of 100% will flood all pixels in the current layer regardless of their difference from the seed point colour. A value of 0% will only allow pixels of the exact same value of the seed point to be flooded.

Restrict to Canvas

When selected the area that can be flooded by the fill bucket tool will be restricted to the canvas area.

Restrict to Range

When this option is selected then the area that can be flooded by the fill bucket tool will be constrained to the width and height values entered here centring around the seed point.

Eyedropper Tool

Eyedropper Tool.

The eyedropper tool allows the user to select an existing colour in the current canvas view by clicking the mouse cursor to become the current canvas colour tool colour. How this colour is determined can be controlled using the following settings:

Sample All Visible Layers

If this setting is deactivated the pixel colour sampling will be restricted to current layer. When active the full composite of all the canvas layers will be used during colour sampling.

Move Tool

Move Tool.

The move tool provides the facility to interactively move the currently selected layer(s), alternatively if a selection is active then the area the selection is covering of the currently selected layer will be moved. The amount of offset used for the move is determined by the distance the mouse cursor is clicked and dragged in the canvas view.

When the shift key is held down during tool interaction movement will be constrained to horizontal and vertical movement.

Show Boundary

If this setting is toggled active then a dashed box will encircle the boundary of the currently selected layer(s).

Free Transform Tool

Free Transform Tool.

The free transform tool provides the facility to interactively move, rotate and scale the currently selected layer(s), alternatively if a selection is active then the area the selection is covering the currently deleted layer will be transformed. A box bounding the currently selection area or selected layer(s) with handles at the corners and edge centres will be displayed.

To perform transforms the following methods can be used:

• Move: Click and drag the mouse cursor inside the bounding box in the canvas view. When the shift key is held movement will be constrained horizontally and vertically.
• Rotate: Click and drag the mouse cursor outside the bounding box in the canvas view.
• Scale: Click and drag the mouse cursor from any of the handles at the corners or edge centres of the bounding box. When the shift key is held and a corner handle is dragged the scale will be contained to the same amount in both width and height.

During interaction of the tool any transforms will be previewed using bilinear interpolation. When a transform operation is completed high quality bicubic interpolation is used.

To complete a transform operation the following methods can be used:

• Press enter key.
• Double click mouse cursor in the transform area bounding box.
• Switch to another canvas tool or perform another operation in PanelForge (a confirmation dialog box will be displayed to confirm the transform).

Flip Horizontal

This button will add a horizontal flip to the current active transform.

Flip Vertical

This button will add a vertical flip to the current active transform.

Rotate -45 Degrees

This button will add a counter-clockwise 45 degree rotation to the current active transform.

Rotate +45 Degrees

This button will add a clockwise 45 degree rotation to the current active transform.

Rectangle Selection Tool

Rectangle Selection Tool.

The rectangle tool provides functionality to quickly change the current canvas selection with rectangular areas. Click and dragging an area in canvas view will replace the current canvas selection with the specified rectangular area. Alternatively if the Shift key is held during tool interaction the specified rectangular area will be added to the current canvas selection, similarly the Alt (Mac: Option) key held will remove the specified rectangular area from current canvas selection.

Lasso Selection Tool

Lasso Selection Tool.

The lasso tool provides functionality to interactively change the currently canvas selection quickly with arbitrary shapes. The default behaviour is to replace the current canvas selection alternatively if the Shift key is held during tool interaction the specified selection will be added to the current canvas selection, similarly the Alt (Mac: Option) key held will remove the specified selection from current canvas selection.

The following to modes are provided to perform selection:

Freeform

Click and dragging the mouse cursor over the canvas view will produce a continues boundary for the new selection area.

Polygonal

Clicking multiple points on the canvas view in sequence will produce a selection boundary constructed from straight lines connecting the points. To complete a selection double click the mouse cursor during the final point, alternatively press the enter key.

Magic Wand Selection Tool

Magic Wand Selection Tool.

The magic wand selection tool will flood areas of the canvas selection where similar colours radiate from a selected seed point. The seed point of the magic wand selection is specified by clicking the mouse cursor on a point of the canvas view. The result of this tool can be controlled using the following settings:

Tolerance

The percentage level that controls the level of difference from the point selected on the current canvas layer that will be flooded with the tool. A value of 100% will flood all pixels in the current layer regardless of their difference from the seed point colour. A value of 0% will only allow pixels of the exact same value of the seed point to be flooded.

Restrict to Canvas

When selected the area that can be flooded by the fill bucket tool will be restricted to the canvas area.

Restrict to Range

When this option is selected then the area that can be flooded by the fill bucket tool will be constrained to the width and height values entered here centring around the seed point.