(There's no video for Sigma Designs PageView 5.7 (Card + Screen Drivers) yet. Please contribute to MR and add a video now!)
Control panels to put in the System folder to use the Sigma Designs PageView / PageView SE card for external screens.
At boot, if the screen is not connected, the control panel will show a dialog box notifying that there's no screen connected or the screen is turned off, and then it will bring you to the Finder desktop anyway.
I found the folder inside a Mac SE FDHD which came with the card. My card is labeled as model PVA-SE-PV88 (last part is handwritten in a blank square) rev. 1.10; I am not sure which other models these drivers will work with - maybe this could be added in the comments.
PageView-SE-5.7.dsk (800 KiB / 819.2 KB)
PageView SE v5.7 (1992) / DSK image
Mac OS 6.x - Mac OS 7.6
Requires a Sigma Designs card
Contains the PageView SE v5.7 control panel and Sigma 12 font.