Delete In A Gnu Screen

Use keyboard shortcuts to remove unwanted changes on an image file.

The GNU image manipulation program is a free online editor that can enhance your images. GIMP version 2.6 can apply filters, paintbrush tools, posterize commands and other effects to transform your basic image. GIMP provides an “Undo History” list of every command applied to the image. To delete an unwanted effect, select an “Undo” command that cancels the change.


1. Launch GNU. A blank image screen appears.

2. Click “File” on the toolbar. A list of commands appears.

3. Click “Open.” The Open Image dialog box appears.

4. Click the file location under the Places pane, then click the image file under the Name pane.

5. Click “Open.” The image file appears on the image screen.

6. Click the “Edit” menu. A list of options appears.

7. Click the “Undo History” option on the list to open the Undo dialog box. The Undo History pane displays thumbnail versions of the image and the applied editing commands.

8. Click the thumbnail image that contains the editing command you wish to delete. For example, to delete an unwanted Paintbrush effect, click the row with the image thumbnail and “Paintbrush.”

9. Click the yellow “Undo the last operation” button at the bottom of the Undo dialog box.

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