Ways to embed links/pictures on 4K
Thanks to TOY for collecting this information:
To embed links to old posts:
[p=*post ID*], example: [p=999999]
or [p=*post ID*,link text here], example: [p=999999,click here]
To embed pictures:
[img1]
Hit the submit or preview button.
You'll be given a window in which to upload a picture from your computer. This will cost you $1 4K money.
Hit submit again to post picture.