Most of them provide accelerator keys to help make it easier to work with menus and other commands. These keys will be very helpful while working with Photoshop: Shortcut Key Task Alt-click ( a filter) To apply a filter: Ctrl + Alt + F: To reapply previously used filter : Ctrl + Z: To undo/redo (single step) Ctrl + Shift + Z: To step forward (redo multiple steps) Ctrl + Alt + Z: To step backward (undo multiple steps) Liquify Filter Keys. Oddly enough, CTRL + SHIFT + J to open the javascript pane works reliably. You can now edit the image as follows: To resize the image, drag any corner. Hold the Alt the key (Option on the Mac) to switch temporarily to the Eyedropper tool and click to select a new foreground color. The possible reasons include: There is a physical problem with the Ctrl button.
