Press F9 on the keyboard to instantly switch keyboard focus to the AceText Editor. If the AceText editor is not visible, pressing F9 will make it visible. Press F8 if you want to hide the editor.
If a clip is selected when you focus the editor, the edit box to edit the clip's contents will receive keyboard focus. When a folder is selected, the edit field for the folder's label will receive keyboard focus. After pressing F9, you can instantly edit the text of the clip or the label of the folder.