I have been testing out Allegro/Orcad 17.4 with a view to moving to it from 17.2. I ran into a strange issue that is causing the display to be slow doing pan & zoom on a board.
The issue directly pertains to the Allegro Start up page. When the page is enabled opening a board and doing a pan zoom etc looks good. But since I don't want that startup page I made a trip to the user preferences and disabled it via "Allegro_No_Startpage" setting.
After restarting allegro the startup page is indeed gone but the display slows down for pan and zoom etc. Pretty weird. In particular it is noticeable while zooming. Removing the allegro_no_startpage option from my .env file returns display performance to normal.
If anyone is on 17.4 maybe they could confirm before I open a bug report.
In addition there is other weirdness. If I zoom in close to a pin the net name on the pin looks fuzzy. On 17.2 this is not the case. On 17.4 it is kind of like the font for the net name is not getting rendered via open gl but by some other method instead.
I am running allegro 17.4 S001