Hello there! Lightroom will not open the different tool windows in the Development module. What can I do?
May I know the name of the tool you are looking for?
If the side panel is visible and completely empty, open the Window->Panels Menu and put check marks in the ones that you want displayed. Alternatively, you can just press Ctrl/1-6 to bring back the different sections. If the side panel is gone, click on the little gray triangle midway down the right side of your monitor screen. Click twice to make it stay displayed.