Placeholders in ui homescreen creation

Hello. As a passion project, I am making an app that mimics a cell phone's software and ui. I am having trouble spacing the apps on my "home screen". The closest I have got to solving this is adding an "absolute arrange" item between each "app" on the "home screen," but that still leaves a line. Are there any placeholder alternatives you know of?

You can't just nest Horizontal and Vertical Arrangements?

No because i can't get rid of the border

wait youre so smart