Pick your pattern and a date range, and every night in that window gets marked. This is a starting point — click any individual night afterwards to correct it to what actually happened. Filling a range overwrites nights already marked inside it.
This range drives the overnight count, the four cards at the top of the page, and the Summary Export. Change it here and every one of them follows.
The summary reports what you entered and nothing else. It is a summary of your own records — not a court document, not a legal filing, and not a statement about what any of it means. Read it before you send it to anyone, check the totals against your own paperwork, and let your attorney tell you what is useful. This file is your working copy.