You can toggle or set values for hidden preferences using the defaults command in the Terminal application or clicking the special ON and OFF links for the desired setting. When setting these preferences via the Terminal, DEVONthink should not not be running or the changes may not be preserved when quitting.

To set a preference using the Terminal, noting the commands are case-sensitive, they are written like this (excluding the parenthesis): defaults write com.devon-technologies.think (the preference name) (the preference type) (the value). For example, the following command enables the preference by setting a -bool (boolean type) to TRUE:

Some hidden preferences require you to specify a numeric value, e.g., CounterDigits. These types of preferences also need to be set via a Terminal command. Use the -int (integer) type before specifying the number, like so:

Other preferences use a -string type. For example, there is a preference to allow DEVONthink to detect other plain text formats as plain text, AdditionalPlainTextExtensions. As this command replaces the existing list of additional plain text extensions, we recommend that you first read the current list (empty by default) before adding your own to them.

Here is a list of the available hidden preferences. Each one includes a description, its data type, and an example value: