Pictures are a bit more tricky. If you're on desktop it's easier;
The image needs to be hosted. If it's already openly online right-click and choose the "copy image address" option. Then you press the image icon (next to the link icon ☝️ ) and paste the link in the box
If you need to host the...
We have two types of spoilers.
[/ICODE]
Or
In the second three dots menu up there ☝️ you pick the icon with an eye dashed over
[/SPOILER]
You get by:
Or
In the first three dot menu ☝️ you pick the eye mask looking icon
Hope that helps ^^