The Rectangle Selection tool is designed to select rectangular regions of an image: it is the most basic of the selection tools, but very commonly used. For information on selections and how they are used in GIMP see Selections; for information on features common to all selection tools see Selection Tools.
This tool is also used for rendering a rectangle on an image. To render a filled rectangle, create a rectangular selection, and then fill it using the Bucket Fill tool. To create a rectangular outline, the simplest and most flexible approach is to create a rectangular selection and then stroke it.
If you want to round the edges of a rectangular selection, the easiest method is using
→ from the image menu.You can access to the Selection Tool in different ways:
From the image menu bar
→ → ;
By clicking on the tool icon
in the ToolBox,
By using the keyboard shortcut R.
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Note |
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See Selection Tools for help with modifier keys that affect all these tools in the same way. Only effects that are specific to the Rectangle Select tool are explained here. |
Pressing the Ctrl key after starting your selection, and holding it down until you are finished, causes your starting point to be used as the center of the selected rectangle, instead of a corner. Note that if you press the Ctrl key before starting to make the selection, the resulting selection will be subtracted from the existing selection.
Pressing the Shift key after starting your selection, and holding it down until you are finished, constrains the selection to be square. Note that if you press the Shift key before starting to make the selection, the resulting selection will be added to the existing selection.
Pressing both keys after starting your selection combines the two effects, giving you a square selection centered on your starting point. Note that pressing these keys before starting your selection intersects the resulting selection with the existing one and the pointer change shape accordingly.
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Note |
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See Selection Tools for help with options that are common to all these tools. Only options that are specific to the Rectangle Select tool are explained here. |
If you enable this option, a slider appears. You can use this to adjust the radius that is used to round the corners of the selection.
If you enable this option, the point the selection is started by pressing the mouse button is used as center of the selected area.
This menu allows you the option of constraining the shape of the rectangle in different ways.
This option allows you to resize the selection while keeping the aspect ratio fixed according to the two numbers entered in the Width and Height controls.
With this choice you can fix the width of the selection.
With this choice you can fix the height of the selection.
With this choice you can fix the width and height of the selection.
If you enable this option, the selected area is emphasized by a surrounding mask to make visual selection much easier.
These four text fields contain the current place and size of the selection. You can use these fields to adjust size and place of the selection by numbers.
With this menu you can select the type of guides that is shown within the selection to make the creation of a selection easier.
No guides are shown at all.
Onyl center lines are shown as guides within the selected area.
Guides are shown along the rule of thirds while creating the selection.
With this selection, guides are shown to mark the golden sections.
The Auto Shrink Selection checkbox will make your next selection automatically shrink to the nearest rectangular shape available on the image layer. The algorithm for finding the best rectangle to shrink to is “intelligent”, which in this case means that it sometimes does surprisingly sophisticated things, and sometimes does surprisingly strange things. In any case, if the region that you want to select has a solid-colored surround, auto-shrinking will always pick it out correctly. Note that the resulting selection does not need to have the same shape as the one you sweep out.
If Sample Merged is also enabled, then Auto Shrink will use the pixel information from the visible display of the image, rather than just from the active layer. For further information regarding Sample Merge, see the glossary entry Sample Merge.