Just wanted to post here since i cant on fl studio forums about the Effect Slots and how there should be like a Rating system or some type of Icons for sorting the Effect slot plugins.
Either a Box with pictures or letters inside such as [RVB] [LIMIT] [COMP] and so on.

 

Look at the picture:

The only icons user can set can be located under the channel numbers. No way to mark the FX slots other than the Fx name (supposing you know what kind of FX you set).

 

I come here 7 years later, but you can set icon and colors for the effect slot. There are icons for number as well and its been possible since way back