Earlier in the conversation I attached a small piece of code and snapshots of the output I get. Were you able to test and see if you get the same results?
Perhaps I do not understand what you mean fully, but the default behavior of the DataGrid is such that it will not draw the rows over the column headers and will not draw anything outside of its boundaries. I feel that I cannot help any further unless you provide code that we can test with.
You cannot attach a file because this is a public forum thread and not a support ticket. In order to open a support ticket, you need your profile to be linked to a licensed account. Alternatively, you can attach the files in some cloud storage and give us a link. Or, if the code is not that much, you can share the code directly in the text editor.
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