unitframe questions

Hello i want to adjust some unitframe stuff but i couldnt find the settings for them. Please check the picture attached.

1-how can i increase the height of my own player unitframe and target unitframe
2-there is a thick border line inside of target unitframe. how can i remove that
3-when i enter combat, dungeon.raid i see another different copy of my unitframe with my health on the center of the screen. how can i remove this?