General preferences
To get to the General preferences, just choose Preferences from the OmniFocus menu, then click the General icon if it is not already selected.
The New Windows section of General preferences controls whether new windows will open with the last-used settings or a Perspective of your choice.
The Quick Entry section of General preferences is where you can specify a keyboard shortcut, modify preferences for the Return and Escape keys, as well as the behavior for cleaning up the actions created by Quick Entry.
In the Backups section, you can specify where your backups will be stored and how often they'll be created.
There’s also a setting for how hierarchical project and context names should be displayed in the main outline. Say you have contexts called “Home” and “Office”, each with another context called “Mac” inside it. When you see those contexts in planning mode’s context column, you might want to see their hierarchy in order to tell them apart. You might also want to see the folder hierarchy for projects in context mode. When you turn on the Show full hierarchy setting, the contexts appear as Home : Mac and Office : Mac. If you’re not a fan of the colon, you can choose or enter a different separator in the field to the right; this is used in the grouping headers and smart match cells whether you turn on the full hierarchy setting or not.