Hello, I'm a new Lightroom user and not sure if I'm missing something. From all the googling I've done it doesn't seem anyone else has had this issue, or maybe I'm just not searching for the right key words. About 50% of the time when using the adjustment brush it stops working as a brush and instead any adjustments I make to the sliders are applied globally to the entire image immediately. This is happening while I am using adjustment brush and have clicked on "new". Is there a setting that's getting changed during my workflow to cause this? Thank you in advance!
A couple of possibilities to consider-
1. You are adjusting the global sliders in the "Basic" panel that is below the Adjustment Brush panel when you have a brush active.
2. When you click 'New' to start a new brush adjustment it should just create another 'pin' and allow different brush effects.
3. Pressing [Enter/Return] will exit the Brush.
4. Pressing [K] will exit the Brush (and also open the adjustment brush! ie. it toggles brush on/off)