Your post's subject and header

When you hit the create post button, you will be taken to the composer:

The title of the post is the same thing as your email subject - By default it will display as your Display Name, followed by the number of which post it is, followed by the date. To update the title and subject of the post, just tap the pencil icon:

The header of your post by default will be your avatar. You have a number of options to edit this.

Firstly, you can do a one-off image header by clicking the three dots and selecting image header:

If you select image header, you can upload an image which will replace the logo:

You can edit/replace the cover image, and delete your username here as well:

If you wish to use your own custom header image by default for all posts, you can make this a universal setting in the settings page here:

All image headers will not be cropped - I.e, they will expand to the max width and just run as high as they need to display the entirety of the image.