The edit menu contains short-cuts to the usual edition actions that any worthy editor of any kind must offer.
Click on Undo to undo the last operation and get back to the state right previous to it. (Keyboard shortcut: Ctrl+z)
Click on Redo to redo the last undone operation. (Keyboard shortcut: Ctrl+y)
Click on Copy to copy the current selection to the clipboard. (Keyboard shortcut:Ctrl+c)
Click on Cut to cut the current selection from the editor and put it into the clipboard. (Keyboard shortcut: Ctrl+x)
Click on Paste to paste to the current editor the contents of the clipboard. (Keyboard shortcut: Ctrl+v)
Click on Delete to delete the selected items. (Keyboard shortcut: Delete)
Click on Select All to select all the items on the screen. (Keyboard shortcut: Ctrl+a)
Click on Duplicate to duplicate the selected item. (Keyboard shortcut: Ctrl+d)
Clik on Find to open a search dialog to look for text terms in the components of your prototype.

Click on Order and choose the option that fits your needs to order the depth of the item you have chosen.
Click on Align and choose the option that best fits your needs. This will set the alignment of your choice to more than one item. The item of reference will be the last one selected.
Click on Group to choose the grouping option that best fits your needs. This will group the items selected on the screen.
Click on Center content... and this screen will apear. You can choose the screens and templates whose content will be centered. Notice that the alignment will not be visible during edition. It will onl be applied in simulation.

Click on Save as image to save the selected items as an image. If no element is selected this will save the screen as an image.