How to determine your correct horizontal position

Hey everyone!

Just a little question to have some tips from the senior members when doing levers. I'm actually working on first steps of BL and FL, and I can mantain a flat tucked FL and BL for a bit of time (enough to get some work!). I'd like to ask you if there's some tip to know when you're horizontal to the ground or not... Obviously, when I train with someone I just let them check for me, or I can use a camera to check LATER, but when I'm practicing alone I don't really know if my hips and back are inclined or horizontal. :|

Any good tips, please?^^

Thanks a lot!

Charlie

Thanks! a string could be very useful, i'll try in my next workout, that's a good advice