Developer mode is a mode that can be invoked via the command-line switch (-devparm) in Vanilla Doom.

When developer mode is activated, pressing F1 captures a screenshot to disk in PCX format. This replaces the help screen that normally appears when F1 is pressed. Furthermore, a set of dots appear at the bottom-left of the screen which can be used to determine the frame rate, using the formula 35 / (number of dots).

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.