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As far as I know, in the current version (Jan 2018) of Designer the presentation settings for the canvas are global and are set by the user in the Canvas settings tab of the User settings. There appears to be no way to adjust canvas settings at the individual workflow level that would over-ride the global defaults. (Please tell me if I am wrong).
I propose that the user defined global defaults be retained but that the workflow configuration window include a new tab where local settings can be set. This tab should include a button that enables a user to reset all local settings to the global defaults.