The RTAS plug-in effects are different from the AudioSuite plug-ins in three ways. First, as their name implies, they do not require rendering. Secondly, the RTAS plug-ins affect entire tracks, rather than individual Segments. And lastly, you can apply up to five RTAS effects to a track at one time.
They are processed in order from left to right, in other words from Insert a to Insert e
You may get different results depending on the order of the effects
Tools Menu | Effect Palette | RTAS category. Also note that there are sets of RTAS Plug-Ins that apply specifically to Mono, Stereo, 5.1, and 7.1 tracks
From within the RTAS Tool: Tools Menu | RTAS
Right-click on an Audio Track Selector | RTAS Tool
Right-click on an Audio Track Selector | RTAS Effects, choose one of the five inserts (a through e), and select a preset from the submenu...