How to change a CRT TVs picture size without a remote?

I have an old CRT television, but the problem is, I always have the edges of the screen cut off. The tv's remote (a proper brand name one) has a button for that that does not work, and there is no way to change it from the tv's menu. Is it possible to fix the tv without getting a new one?How to change a CRT TVs picture size without a remote?
you might try unplugging it for a day to try to get it to set to factory default settingsHow to change a CRT TVs picture size without a remote?
If it's very old TV than it might still using a VR for TV size this you can adjust it just need to turn. but if it's not to old than it using data adjustment you need to go to service mode to adjust this.