My illustrator opens this way by default. I have no idea why or how. I have tried tweaking settings in document setup, preferences, etc. but it always opens a new Ai document like this. My older Ai files are fine tho. Can someone please tell me how to remove these rulers around grid and how to get the normal background instead of a transparent one?
What you are looking at isn't weird but the artboard setup for video. They indicate the safe area for a screen, where the center of the screen would be and ruler around the outside.
The easiest way to resolve this is to simply not select a template from the Video and Film collection when you are setting up a new artboard.
However, you can easily change these in the document
To change the grid transparency (the checkered background) head to VIEW / HIDE TRANSPARENCY GRID
To hide (or show) the rulers on the edge head to VIEW / RULERS / SHOW/HIDE VIDEO RULES
To hide (or show) the safe zones and cross hairs head to ARTBOARD OPTIONS and uncheck SHOW CROSS HAIRS, SHOW CENTER MARK and SHOW VIDEO SAFE AREA