Coming from ReaperTracks, items and FX
Choose lane-style routing and a lane works like a Reaper track: what is on it plays through its own mixer track. Items are clips, and the MIDI editor is the piano roll under the arrangement.
Instruments live in the channel rack rather than on the track: add one there, select it, and draw it onto a lane. Effects go on the mixer track, in its inspector, and sends and outputs are there too.
Space plays, Ctrl+B splits at the marker, and every shortcut can be changed on the shortcuts page.
Coming from LogicTracks, regions and channel strips
Lane-style routing is Logic's way: each lane is a track with a channel strip in the mixer. Regions are clips, and the piano roll sits under the arrangement.
The Library is the browser on the left. A software instrument is a row of the channel rack, opened in its own window with ≡; drawn onto a lane, it plays through that lane's strip.
Coming from AbletonArrangement, clips and devices
Fontelle is an arrangement-view DAW; there is no session view. With lane-style routing a lane is a track: its clips play through its mixer track.
An instrument device is a row of the channel rack, with its own window. Audio effects go on mixer tracks rather than in a device chain on the clip's track. The browser on the left is where sounds and files come from.
Coming from FL StudioChannel rack, playlist and mixer
Rack-style routing is FL's: the channel rack is the channel rack, and the coloured chip on a row is its target mixer track. The arrangement is the playlist, where any clip can go on any lane.
Clips hold notes for one or more instruments, like patterns, and prefabs let one set of notes appear in many places. Most of FL's keys work the same: Space, Ctrl+S, P for the pencil, B for paint, E to select, D to delete.