I don't know what I did, but on the main BI view showing "cameras", all camera views used to be the same size. Now I have one big view and 3 tiny views (for the 3 other cameras). What'd I do & how can I fix?
I haven't touched that feature in a long time so I'm not entirely sure if this is it... But I think the control you are looking for is a little horizontal scroll bar next to an icon that looks like gray boxes. It is located underneath the camera view area.
Or it might be a right click menu that I'm thinking of. Anyway somewhere there is the option to show some number of cameras larger than the rest, and another option to change the scale of the larger cameras vs the smaller cameras. You want to set it to have no cameras larger than the others again.
My apologies for being so unspecific. I don't have easy access to my BI at this moment so I'm basing all this off memory and the screenshot at the blue iris web site. LOL