Delete the preference file

Another tip to troubleshoot an application that isn't acting right is to delete that application's preference file. This is perfectly safe—when the application opens up again, it will recreate a new preference file from scratch. You will lose any preferences you had personally changed in the application, but it can be worth it because this works pretty good to solve inexplicable annoyances.

1.
Quit the application.
2.
Open a Finder window and view it by columns, as shown below.
3.
Single-click your Home icon in the Sidebar.
4.
In the column that appears to the right, single-click the “Library” folder.
5.
In the next column to the right, single-click the “Preferences” folder.
6.
In the next column to the right, find the ...

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