Social Media Publishing Beginner · 6 min read · Updated October 2026

Cross-Posting to Facebook, Instagram & LinkedIn with Media

Draft once, customize per network, upload image/video assets with aspect ratio previews, schedule first-comment hashtags, and publish seamlessly.

Summarize runbook:

ChatGPT Perplexity Claude

Platform Navigation Coordinates

Where to find this in your workspace:

Left Sidebar → Social Media → Compose New Post

Key Takeaways & Architectural Rules

Compose a base post and customize text, hashtags, and formatting independently per channel.
Upload image and video assets with automatic validation of file size and aspect ratios.
Schedule hashtags into the first comment for cleaner Instagram captions.
Preview live mockups across Facebook News Feed, Instagram Mobile, and LinkedIn Desktop.

EXECUTION PLAYBOOK

How to Do & From Where to Do (4 Steps)

Open the Multi-Channel Composer

Screen: Top Action Bar or Calendar → Click 'Compose Post'.

A modal composer opens. Select the target networks by clicking their icons (Facebook, Instagram, LinkedIn).

Pro-Tip A checkmark indicates the channel will receive the post.

Customize Copy Per Channel

Screen: Composer Body → Toggle channel tabs (e.g. 'Customize for LinkedIn').

Write your master copy. Click the channel tab to tweak the text: add professional paragraphs and bullet points for LinkedIn, shorten copy and insert emojis for Instagram.

Pro-Tip Character counters display remaining allowances specific to each network's character ceiling.

Upload Media & Validate Aspect Ratios

Screen: Media Section → Drag & Drop JPG, PNG, or MP4 files.

Upload your media. The preview pane renders exact mockups for each platform. If an image is 16:9 landscape, the composer suggests cropping to 1:1 square or 4:5 vertical for Instagram feed compatibility.

Pro-Tip For Instagram, you can check 'Place hashtags in first comment' to keep the main caption clean.

Publish Immediately or Schedule

Screen: Bottom Action Bar → Choose 'Publish Now' or 'Schedule for Later'.

Pick your desired date and time down to the minute. Click 'Schedule Post'. The item is queued and ready for broadcast.

Pro-Tip Scheduled posts are immediately visible on your Social Calendar.

INTERACTIVE TOOL WORKSPACE

Actual Screen & Telemetry Inspection

Examine the exact SEO Runway screen below with live parameters and dummy data to see how findings appear and where to execute actions.

            
            https://app.seorunway.com/projects/saas-matrix/social-media/
          

QUEUE: 28 POSTS SCHEDULED

SEO RUNWAY /

SaaS Matrix Platform (saasmatrix.io)

Scheduled Posts

            28 Ready
            Next 14 Days
          

Connected Networks

            4 Profiles
            LinkedIn, X, IG, YT
          

Engagement Rate

            4.8%
            +1.2% this month
          

Optimal Post Window

            14:30 UTC
            Highest Audience Activity
          

Scheduled Content Queue & Multi-Platform Dispatch

Showing 4 of 24,810 records

Post Topic / Hook	Target Channels	Scheduled Time (UTC)	Status
5 Common Mistakes Founders Make with Multi-Cloud...	LinkedIn, X (Twitter)	Today 14:30 (Peak)	Ready to Post
Visual Breakdown: Microservices vs Monolith in 2026	LinkedIn Carousel, Instagram	Tomorrow 16:00	Assets Approved
Behind the Build: How We Reduced P99 API Latency 60%	X Thread, YouTube Community	Thursday 14:00	Client Reviewed
Product Feature Teaser: Instant llms.txt validation	LinkedIn, X (Twitter)	Friday 15:30	In Draft

            
            How to Read & Execute on This Screen in SEO Runway
          

① AI 30-Day Calendar Generator

Generates a full month of engaging industry-specific hooks, carousel copy, and hashtags in seconds.

② Audience Peak-Hour Optimizer

Calculates the exact minute your followers are most active to maximize early impressions and algorithm reach.

③ Direct Multi-Network API Dispatch

Auto-publishes native carousel images, threads, and rich text without third-party buffer tools.

Field Insights & Advanced Tactics

Vertical video (9:16) gets the highest distribution across modern social algorithms. Always optimize Reels and Short-form video for mobile full-screen viewing.

Tag relevant business partners or clients using their handle to expand organic impressions across their follower networks.

Frequently Asked Questions

What video formats are supported?

SEO Runway supports MP4 and MOV video containers up to 500MB in size with H.264 video codec and AAC audio.

Need tailored assistance?

Our customer engineering team can review your project setup, calibrate your rank trackers, or audit your GEO readiness. Reach out anytime.

Start 14-day free trial See packages and pricing