<imgsrc="doc/img/camera.png"width="32"height="32"alt="editor"align="left"style="padding-bottom: 20px;"> Upload a picture from your computer. The image will be uploaded and correct bbcode tag will be added to your post.*
<imgsrc="doc/img/paper_clip.png"width="32"height="32"alt="paper_clip"align="left"> Add files from your computer. Same as picture, but for generic attachment to the post.*
<imgsrc="doc/img/chain.png"width="32"height="32"alt="chain"align="left"> Add a web address (url). Enter an url and Friendica will add to your post a link to the url and an excerpt from the web site, if possible.
<imgsrc="doc/img/video.png"width="32"height="32"alt="video"align="left"> Add a video. Enter the url to a video (ogg) or to a video page on youtube or vimeo, and it will be embedded in your post with a preview. Friendica is using [HTML5](http://en.wikipedia.org/wiki/HTML5_video) for embedding content. Therefore, the supported files are depending on your browser and operating system (OS). Some filetypes are WebM, MP4 and OGG.*
<imgsrc="doc/img/mic.png"width="32"height="32"alt="mic"align="left"style="padding-bottom: 20px;"> Add an audio. Same as video, but for audio. Depending on your browser and operation system MP3, OGG and AAC are supported. Additionally, you are able to add URLs from audiohosters like Soundcloud.
<imgsrc="doc/img/globe.png"width="32"height="32"alt="globe"align="left"> Set your geographic location. This location will be added into a Google Maps search. That's why a note like "New York" or "10004" is already enough.
**<imgsrc="doc/img/lock.png"width="32"height="32"alt="lock icon"style="vertical-align:middle;"> The lock**
The last button, the Lock, is the most important feature in Friendica. If the lock is open, your post will be public, and will shows up on your profile page when strangers visit it.
Click on it and the *Permission settings* window (aka "*Access Control Selector*" or "*ACL Selector*") pops up. There you can select who can see the post.