Develop Module: Right Panel No Longer Pops Up When Mousing Over

[Explore]

Previously in Develop, when mousing over to the right, the right-hand editing panel would automatically appear for use.  Mouse back, and it would disappear.  

Now, each time, to activate the panel I must click on the right arrow.  When editing hundreds of photos, this adds a wee bit of time, and more importantly, constricts the photo size until I click the arrow again to hide the panel.

Any workarounds?

Thanks....

[johnrellis]

Do the menu command Window > Panels > Toggle Side Panels a few times -- perhaps that will "jog" LR back into correct operation.  

If that doesn't help, try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.

[Theresa J · Accepted solution]

Control click on the little arrow and make sure it isn't set to manual. When the arrow is set to manual it will appear to have a solid fill. If it is set to auto, the triangle shape is filled with small dots.