Selection tools let you specify an editing area on an image. The selected area is marked by a dotted outline. Within this area tools, effects, and adjustments will be applied. You can move the selection outline in the image - place the cursor inside the selected area and drag.
Rectangular Selection lets selecting rectangular and square areas. Drag over the area you want to select with the left mouse button.
Elliptical Selection lets selecting elliptical or circular areas.
Lasso allows creating freehand selections. Drag to draw a selection line around an object. When you release the left mouse button, the contour will be closed, the final point will be connected to the start one.
Polygonal Lasso lets creating a freehand selection from straight segments. Move the cursor and left-click on each point, the program will automatically draw a straight line between two points. To close the contour bring the cursor to the first point or make a double-click in the final point.
Hold Shift to make a square or a circle and to draw a perfectly vertical/horizontal line.
The basic tool settings are shown in the Tool Options panel above the Image Window. To display the full list of parameters, press the tool icon in the Tool Options panel, or right-click the image.
Parameters (may vary depending on the tool):
Selection Mode defines the result of the interaction of selections:
New . When creating a new selection, the previous selection disappears.
Add . The selection area will be increased by adding new fragments.
Subtract . This mode lets removing the part of the selection.
Intersect . This mode lets keeping only the intersection area of the selections.
Feather (0-250). The parameter lets blurring edges of the selection.
Anti-Aliasing check-box smooths the jagged edges of the selection. Enable this option before creating a selection.
From Center check-box lets creating a selection (a rectangle or an ellipse) using a start point, where the cursor is, as a center. Otherwise, selections are created from a corner.
Style. You can specify a size of a selection:
Normal. The size of a selection is determined by dragging the cursor.
Fixed Size. This option lets you create a selection with exact dimensions (height and width, in pixels).
Fixed Ratio. The ratio of height and width of a selection remains fixed.
In the View Mode drop-down list, choose a mask view mode. All view modes except for "marching ants" allows to edit the selection using the standard brushes.
Using the Refine Edges feature you can quickly adjust edges of selections.
To create and manipulate a selection, use the standard editor commands.
All selections are displayed in the Selections Panel.