some operation in HOTGLUE can be also done using conventional keyboard shortcuts:
Arrow keys (up, dow, left and right) - move selected object by 1px
Shift + Arrow keys - move selected object by grid size (50px by default)
Delete or Del - delete selected object
Ctrl + A - select object on the page.
Shift + click on object - add/remove it to/from selection (selected objects can be moved or deleted with keyboard shortcut).
Alt + O - new object menu, aka signle-click menu (useful when you have no empty space left of the page to invoke the menu with mouse click)
Alt + P - page menu, aka double-click menu
Shift + click on color related icon - shows current color code of the object (useful for copying color of text or background)
Hold Shift when resizing objects - lock aspect ratio