CMS Made Simple is a great content management system. It’s free, easy to get to grips with, quite powerful and the forums are fairly helpful when you need help.
There are obviously quirks with it (as there is with all off the shelf software) such as tables inserted within the WYSIWYG editor lacking any outlines, making placement quite problematic (think “invisible table”).
Thankfully there is an answer with at least the current versions of CMS Made Simple (1.4.1 at the time of writing this) having an option to turn table outline borders on and off.
From within the CMS Made Simple admin control panel, go to: Extensions > TinyMCE WYSIWYG > Advanced (tab)
There you should see a checkbox for the option “Include only screen CSS”. Tick that, update the settings and give the WYSIWYG editor a whirl.
If all has gone well, you should now see the outline borders when editing page contents.