I tried control/alt/f8 as you said. It left me with only one monitor, the other one, so I went to extended desktop to get both monitors working, but the tax program is still only using 1/3 of my screen. Thanks for trying, but that did not work. Any other suggestions?
Are these the steps you are following to extended your desktop;
In desktop mode, right-click the Desktop and select Graphics Properties.
Click Display > Multiple Displays.
Select extended desktop mode and click apply.
Try this too; go to "3D", then select "General Settings > Custom Settings", proceed to select either "Use Application Settings" or "On".
Let me know if it helps.
Would like to tag onto this thread regarding the control alt f8 problem. Accidentally hit this combination and lost my main screen of three. Have to shut the other two displays off to use the main one. Have a NUC with the 580 card. Have tried all the suggestions on web as to how to undo this with no success. Is there an way to undo this so I can use all three monitors? If I do a reinstall of Windows 10 would this solve the problem or is it embedded in the graphics card somehow so that I would have the same problem after Windows reinstall?
For us to further assist you and to help you with the specific problem, please create a new thread, make sure to add all the details in regard to your system. This way the next agent will have a better look at your specific scenario, you can add this thread as a reference but I recommend creating a new thread in order to isolate your case.
Thanks for quick response. I have started a new thread on this.