don't do anything in the footer. report footers and page footers are both summary-type sections. your records should be in the detail section of the report. in design view, there should only be one line of controls in the detail section because reports are usually continuous in nature (multiple records displayed, one after the other).
if the menu option is not there, you might have it turned off. it is located in the access options under the ribbon menu, but I forget what section it's under. I think "current database". look for "use shortcut menus" or "use full menus".
if that doesn't work, you can always click the property sheet icon in the design tab of the ribbon and put some code behind the "on load" event. for what you're doing, you can probably write something like this:
Code:
me.textbox.formatconditions.add acfieldvalue, acequal,0
me.textbox.formatconditions(0).backcolor = RGB(255, 0, 0)
be aware though, that you should only use the ADD code above once, NOT on the load event because it will add a condition to your textbox everytime you load the report. if you do use that, run it once only and then delete it.
RGB() is a basic color function. you can only get red, green and blue from it. 255 is the max value for each argument. e.g. - for complete blue color, use (0,0,255).