Bodhi doesnt have a centralized GUI for those kind of settings that I know of. There may be some things in various places in settings panel, otherwise you just edit config files directly.
If you describe what specifically you're trying to change might be easier to provide solution. For example if you want to change what happens when you close laptop lid you edit /etc/systemd/logind.conf
I have the following problem: pc suspends after the boot, I have to press continuously on the keyboard. So I thought some parameters should be changed (standby timeout?). I tried what you suggested (#HandleSuspendKey=ignore) but with no results. I found on the web this solution that works: sudo systemctl mask sleep.target suspend.target etc. But I'm not convinced about this extreme solution.