Tesla Menu (by WerWolv) is the in-game overlay framework for Switch. By itself it has no features — it acts as a host for .ovl files (Status Monitor, sys-clk overlay, edizon overlay, etc.). If you use homebrew under CFW, this is effectively required infrastructure.
Default shortcut: hold L + ZL + ↓ together. The menu appears as a translucent overlay on top of any running game without pausing it. The same combo closes it again.
ovlloader.zip + Tesla-Menu.zip from the GitHub releases./atmosphere/contents/420000000007E51A/ (the ovlloader sysmodule) and /switch/.overlays/ovlmenu.ovl.Each overlay is a standalone .ovl file. Drop it into /switch/.overlays/ and it shows up in Tesla Menu's list automatically.
sys-clk-OverlayLoader.ovl)Edit /config/tesla/config.ini:
[tesla] key_combo = L+ZL+DOWN
You can rebind to e.g. R+ZR+UP. In games that use L+ZL heavily (Apex etc.), pick something non-colliding like MINUS+DPAD_DOWN.
Tesla Menu and our loader both run under Atmosphère, so they coexist on one SD. You can run Apex via the loader while pulling up sys-clk or Status Monitor mid-game through Tesla. The loader has its own built-in HUD and option toggles, so Tesla Menu isn't required — but useful if you want other overlays alongside.