So I just got lightroom 6; Everything was working fine, until today: I can get into the develop module, and the sliders work, but whenever I select one of the tools (crop, red eye, mask, adjustment brush), the tool will become selected, but whenever I go over to the photo to adjust it, the only thing that appears is the regular mouse icon, no brush, and it won't let me interact with the photos. Any suggestions?
Hi Led Trousers,
Activate toolbar by going to View menu > Show toolbar (if not already enabled) > and make sure tool overlay is set to Always.
If that does not help, you should reset Lightroom Preferences : Resetting (or 'Trashing') the Lightroom Preferences file | Lightroom Forums