 Curve tools
Spline Curve
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You can add a new control point by clicking the mouse.
Between each pair of control points there is a spline curve.
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You can move a control point by dragging it with the mouse.
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A spline curve is fixed on the canvas, when you
Right Click
(Mac: Command+Click).
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Bezier Curve
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You can set the start point1 and the end point2
by dragging the mouse.
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Then you put two direction points3 and 4 on the canvas.
These two points set the tangents at the point1 and 2 respectively.
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A bezier curve is drawn and fixed after you put the point4.
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Dodge, Burn, Finger and Blur
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Dodge is used to lighten an image and Burn darkens an image.
The figure shows the effect of each tools.
The top light green line is the original one, the middle line shows
the effect of Dodge and the bottom shows the effect of Burn.
The effectiveness of these tools can be adjusted by
using the opacity slider in the Color Palette.
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The finger tool smudges the graphics
where it's used.
The smudging level can be controled by the opacity slider.。
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Blur lessens the contrast between pixels softening the overall look of the image.
The bluring effect can be adjusted by changing the opacity slide in the Color Palette.
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Selecting tools
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Selections are areas of an image
you choose to isolate
from the rest of the image to make
modifications.
To construct a selection
of multiple selections
hold the Shift
key down when creating the selections.
Holding the Alt
key down while creating additional selections
causes the new selections to be subtracted
from the already created selection.
To unselect everything,
simply click on the unselected areas or press
Ctrl+D.
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To repeat last selection, press
Ctrl+F.
To make inverse selection, press
Ctrl+G.
The selections can be moved by clicking on the area and dragging.
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