Media, Studio and AI
You add pictures and videos with the buttons under the text in the Create Post window. For the rest of that window, see Writing a post.
Add media to a post
Click Insert Media. The Media Library window opens with everything you have uploaded.
- Click the files you want. Each one gets a number, which is its order in the post.
- To add a new file, click Upload, or drag files into the window.
- Click Add selected media.
You can also drag files straight onto the text box, or paste a picture into it.
The files show as thumbnails under the text. Drag a thumbnail’s handle to reorder it, or click its cross to remove it.
Hover over a thumbnail and click the settings icon to open Media Settings:
- Alt text (for accessibility) describes the file for screen readers. For a picture, Describe it for me writes it for you.
- For an MP4 video, Create Thumbnail lets you choose the cover frame.
- Click Save Changes.
The small pencil on a picture thumbnail opens it in Studio, so you can change the design.
File types and size limits
| Type | Formats | Largest file |
|---|---|---|
| Pictures | PNG, JPEG, GIF, WebP | 30 MB |
| Videos | MP4 | 1 GB |
One upload can be up to 1 GB in total. If a file has the wrong type or is too big, Postra tells you and does not upload it.
AI Image
If your plan includes AI, the toolbar has an AI Image button.
- Click AI Image. The Generate AI Image window shows your image credits left.
- Under Prompt, describe the picture.
- Pick a Style, for example Realistic, Cartoon, Watercolor, Minimalist or Pop Art.
- Click Generate. The picture is added to the post when it is ready.
AI Video
If your plan includes AI, the toolbar also has AI Video. It is not shown on phones.
- Click AI Video. The window shows how many video credits you have left.
- If there is more than one kind of video, choose one.
- Choose Vertical (Stories, Reels) or Horizontal (Normal Post).
- Fill in the fields and click Generate. The video is added to the post when ready.
Studio
Studio is where you make graphics and short videos. Open it from Studio in the main menu, or with the Studio button in the Create Post window. It needs a laptop or desktop screen.
Studio has two tabs, Graphics and Video. The ? button opens help in a new tab.
Graphics
The tools sit on the left. Hover over each one to see its name:
- AI Generate makes a design from your description. AI Refine changes the current design from your instructions: text, colours, layout. Both need a plan that includes AI design.
- Templates gives you ready-made layouts and your own saved templates.
- Stock photos searches free photos from Pixabay, which you can use commercially without credit. Click a photo to save it to your library and place it on the canvas. If more than one photo library is offered, choose one at the top of the panel.
- Brand Kit stores your colours, font, logo and tone. AI designs, templates and video text use them. Use the colours from my logo reads the colours for you.
- Select, Text, Shapes, Icons, Images and Layers are the editing tools.
The Format bar under the canvas sets the size: IG Feed (4:5), IG Square (1:1), IG Story (9:16), FB Feed (1:1), LinkedIn (1:1), TikTok (9:16) or X Post (16:9). The pixel size shows on the right.
Carousel mode makes a post with several slides, up to 10. Your current design becomes Slide 1. Then:
- Slide adds an empty slide.
- Duplicate copies the current slide.
- Apply layout copies the current slide’s layout to every slide.
- Exit leaves carousel mode. The extra slides are lost.
The Export menu has Save to library, Save as template, Download PNG and All formats. All formats makes the design in all seven sizes at once. You can then Download all (ZIP). When you opened Studio from the Create Post window, you can also Add all to post.
Use in Post finishes the design. From the Create Post window, it adds the design to that post. From the Studio page, it starts a new post with it. In carousel mode the button reads Export 3 slides, with your number of slides.
Video
The Video tab starts with What do you want to make? Each goal opens one tool. The same tools are also tabs at the top:
| Goal | Tab | What it does |
|---|---|---|
| Photos → Reels | Photos → video | Turns a few photos into a video with motion |
| Trim a video | Trim | Cuts a clip to the right length |
| Add captions | AI Captions | Writes subtitles from the speech and burns them in |
| Text on video | Text | Puts your message on the video in your brand style |
| Find stock B-roll | Stock B-roll | Free clips from Pixabay. Import saves one to your library |
| Resize for platforms | Formats | Reframes one clip for IG Reel / TikTok / Story (9:16), IG Feed (1:1) and YouTube / X (16:9) |
To edit your own clip, choose From disk (MP4, WebM or MOV, up to 200 MB) or From library.
When a video is ready, Postra saves it to your media library. If you opened Studio from the Create Post window, the video goes straight into the post. On the Studio page, click Use in post to start a post with it, or Keep working. After a trim you can also click Save to library.
The Media page
Media in the main menu shows every picture and video you have uploaded or made.
- Search by file name finds a file.
- Upload adds files. You can also drag files onto the page.
- Create in Studio opens Studio.
Hover over a file for its buttons: the expand icon shows it full size, Edit in Studio opens a picture in Studio, and the red icon deletes it. Postra asks before it deletes.