Screen resolution: How can I correctly position pushbuttons below a table, the difficulty being that the table has a variable number of lines?

In order to position pushbuttons below a table (which has a variable number of lines) you can use relative coordinates. Use a standard button or field below the table, e.g. the button P[Show details of], and an offset relative to this button:

Pushbutton P[Show details of]+(3,0) "List of... "

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A different, but more complicated, approach is to use the
"GetTableAttribute" statement to calculate the right row.