# Matrix hacks
#tool/matrix #typ/Cheatsheet
Element Desktop and Web can do a lot more funny stuff than the UI exposes. Type `/help` and hint enter in any room to view all commands. Here are my favourites:
| Command | Argument | Explanation |
| ------------------ | ------------------ | ------------------------------------------------------ |
| **/spoiler** | message | Sends the given message as a spoiler |
| **/shrug** | message | Prepends ¯\_(ツ)_/¯ to a plain-text message |
| **/rainbow** | message | Sends the given message coloured as a rainbow |
| **/rainbowme** | message | Sends the given emote coloured as a rainbow |
| **/spaceinvaders** | message | Sends the given message with a space themed effect |
| **/myroomnick** | display_name | Changes your display nickname in the current room only |
| **/myroomavatar** | [mxc_url] | Changes your profile picture in this current room only |
| **/ban** | user-id [reason] | Bans user with given id |
| **/devtools** | | Opens the Developer Tools dialog |
## Move Room
Want to turn on federation oder turn off encryption? You are in luck, theres a workaround! Create a new room with the desired settings. Then in your old one do the following:
1. use element desktop or web
2. in the old room, use `/devtools` command
3. select "Send custom timeline event"
Event Type: `m.room.tombstone`
Event Content:
```
{
"body": "Dieser Raum hat seine Lebensdauer erreicht und wurde durch einen neuen ersetzt. Denk daran den alten raum zu verlassen und, wenn nötig, zu löschen",
"replacement_room": "!target_room_id:server.tld"
}
```
(obviously replace the room URL with your new one)
## Resolve "Unable to Decrypt" errors
- Here is an interesting read about the topic: [Unable to Decrypt a Message on Matrix - blog.neko.dev](https://blog.neko.dev/posts/unable-to-decrypt-matrix.html)
- As admin you may check if the involved servers federation is miscinfigured badly: [Matrix Federation Tester](https://federationtester.matrix.org)
As a user, view the Guide on [Joinmatrix](https://joinmatrix.org/guide/fix-decryption-error/) (English)
...or my help page (Deutsch):
![[Nutzung von Matrix mit Element#Häufige Fehler]]