Once the application is installed you can use the Preferences dialog accessed from menu Options > Preferences to customize the application.

Option pages are organized hierarchically in a tree-like structure displayed in the left side of the Preferences dialog. The option tree features a search box that allows you to look for a specific option name: just type-in relevant keywords and the entire options structure is trimmed down. To navigate the tree structure, use the Up/Down keys or click the tree entries to display the options pages in the right side of the Preferences dialog.

The Search field from the Preferences dialog

You can always revert modifications to their default values by pressing the Restore Defaults button, available in each options page.

If you don't know how to use a specific preference that is available in any Preferences panel or what effect it will have you can open a help page about the current panel at any time pressing the help button located in the left bottom corner of the dialog or pressing the F1 key.