In the US version of MacDraw Pro 1.0/1.5, command-option-space shows / hides the tool bar. This works correctly with System 6. However, with System 7, command-option-spacec is used to switch keyboard layouts. Thus, when running MacDraw Pro on a computer with System 7 and multiple key layouts, command-option-space activates the Keyboard cDev instead of showing/hiding the tool bar.
In MacDraw Pro 1.5v2, a second keyboard command (command-option-tab) has been added to show / hide the toolbar. Use this keyboard command with System 7.
Non-US versions of MacDraw Pro do NOT use command-option spacebar to show/hide the tool bar, in order to avoid this conflict. Non-British international versions use various keyboard shortcuts other than command-option-spacebar. The British version has no shortcut at all to show/hide the tool bar.
This is fixed in MacDraw Pro 1.5v2