Arc and Slice v5.1 introduces a suite of powerful new features designed to enhance your TM1 development experience.
⚠️ Upgrade Notice for v5.1.0
The Atmosphere portal is now fully embedded within Arc.
If you’re upgrading from version v5.0.0 or v5.0.1, please manually delete the following folder before proceeding:
<Arc folder>/plugins/atmosphere
✨ What’s New in v5.1
🔄 Keep & Swap
A smarter way to explore your data in the Cube Viewer.
Right-click on rows or columns to access Keep & Swap—a dual-action feature that retains the selected element and swaps it with a hierarchy of your choice. This streamlines your drill-down workflow with a single click.

🧭 Redesigned Context Menu
The Cube Viewer’s context menu has been revamped for clarity and efficiency.
Swap and Keep & Swap options are now grouped for easier access. Prefer a different layout? You can customize the menu structure directly from your Cube View settings.

🛠️ Bedrock Installation Enhancements
The Install Bedrock feature now adapts to your TM1 version:
- TM1 v11 → Installs Bedrock 4
- TM1 v12 → Installs Bedrock 5 (rewritten for TM1 v12)
Note: Bedrock 5 is scheduled for official release on September 30.

📰 NewsFeed Integration
Stay connected with your users via the new NewsFeed bar.
It displays updates from Cubewise Software and allows you to add your own custom feed—creating a direct communication channel within the app.
For more information, you can open the <Arc folder>/custom-feeds/readme.md file.

🆚 Side-by-Side Code Comparison
Quickly identify changes between two instances or across different dates.
This feature makes it easy to track modifications and maintain version control with precision.

🕵️♂️ Blame Report for TM1
Inspired by Git’s popular Blame feature, Arc+ now lets you generate Blame Reports for your TM1 developments.
See exactly who changed what, and when—line by line.

For a full list of features, enhancements and bug fixes, check out the release notes for 5.1.0.
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