And make sure you bring a tissue to wipe the highlighter off the screen
bugga ... are the ATPLs on PC guesswork these days ? .. guess that shows my age ...
If the index unit lines to the next row down are not straight
keep in mind that the whole trimsheet is drawn against a vertical scale of IU. Generally, when designing and drawing up a sheet, we run what look to be guidelines right down the page - these will usually be the major IU divisions. If the sheet doesn't have that (and that would be unusual) then it probably has some lower guidance IU scale - point is a longer rule can be used to get the vertical correct and then the protractor (ID card, whatever) can be slid along the rule to draw in the droplines.
I haven't seen the current exam sheet but, if anyone can post a scan, I can answer any questions you may have on the construction and hints for easier use.