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Media Composer (designs)

The Media Composer makes on-brand images and carousels for your posts, right in reelport.io. Open Media and click Designs, or click Design one in a post's media tray to design straight into that post. Finished designs land in Media.

1. Start a design

Under New design, pick a format:

Format Size
Instagram post 1080 × 1350 (4:5)
Instagram grid post 1080 × 1440 (3:4)
Square post 1080 × 1080
Story / Reel cover, TikTok photo / cover 1080 × 1920 (9:16)
LinkedIn document (PDF) 1080 × 1350
Pinterest pin 1000 × 1500 (2:3)
YouTube thumbnail 1280 × 720
X / Bluesky / Mastodon 1600 × 900
LinkedIn / Facebook link 1200 × 628

Your designs lists what you made. Deleting a design keeps the files you exported to Media.

2. The editor

The rail on the left has six tabs:

  • Templates: over a hundred layouts (announcements, launches, sales, quotes, testimonials, before & after, tips, how-to, events, hiring, seasonal and more) and carousels. They use your brand colours and fonts and fit any format. Interactive templates ask a few questions and lay themselves out.
  • Elements: shapes, lines, photo frames, badges, call-to-action buttons, icons and story stickers.
  • Text: Add a heading, Add a subheading, Add body text, with highlight, outline and shadow styles. Fonts come from about 2,000 families on Bunny Fonts (an EU Google Fonts mirror without cookies).
  • Photos: Upload a photo or pick one from Media. Imports from Canva, Google Drive, Dropbox and stock photos go to Media first. Adjust exposure and contrast, add a filter, or Remove background (one image credit).
  • Brand: your brand kit colours, Add logo, Add as watermark and Apply brand fonts to this design. Set these up in the brand kit.
  • Layers: show, hide and lock each layer.

Safe zones (key S) shows where each app covers or crops the picture.

Carousels

Add slide, Duplicate slide, Delete slide and the arrows build a carousel of up to 20 slides. On Free a design has one slide; carousels need Creator.

Magic resize

Magic resize to other formats copies the design into other sizes, each laid out again. Check every copy before you post it. Needs Creator.

Saving

Designs save themselves a moment after each change; the top bar shows Saved. ⌘S saves at once. Pro and Agency can Save this design as a team template for everyone on the team.

3. Use it in a post

Click Use in post (or Add to post when you came from the composer). The slides are saved to Media and Open in composer starts a post with them attached, in order. Tick Draft a caption from the slides or Write alt text for each slide to let AI help (one AI credit each, from Creator).

To download instead, open Export: PNG, JPG, WebP or PDF (the default for LinkedIn documents), at 1× or 2×, all slides or one. Save to Media keeps a copy in Media.

Keyboard shortcuts

Press ? in the editor for the full list.

Keys Does
⌘Z / ⇧⌘Z Undo / redo
⌘D Duplicate
⌫ Delete
⌘G / ⇧⌘G Group / ungroup
⌘] / ⌘[ Forward / backward (with ⇧: to front / back)
Arrow keys Nudge (with ⇧: 10 times as far)
T Add a heading
S Safe zones
Hold ⌥ Drag without snapping

Plans

Free Creator Pro Agency
Slides per design 1 20 20 20
Image credits a month (remove background) 0 50 200 500
Team templates No No Yes Yes