From the left navigation select "Create Post"
select Twitter (note: there is a breadcrumb navigation showing you in which Project you are about to create the post)
Step 1 (Campaign details) select the campaign and the channel:
Step 2 (Post settings) put Start Date and time. This is the time the post will be published. If you enter end date the post will be unpublished at the date and time entered. You can select a timezone in case you have to schedule something for another timezone than the one you are currently in.
Set the language the post text is written in. This is useful for future searches.
Tags: Add tags to the post – you can select already existing ones from the dropdown or add new ones by typing them in and pressing enter.
Notes: In case you need to add additional information you can do this at the notes-field.
Step 3 (Tweet) Put in the post copy, upload up to 4 images, a GIF or a video. The tool does realtime checking of the posts content and gives you feedback on the right side.
Step 4 (Location) You can set a geo location to the post.
Step 5: Press SAVE