This section documents the technical limits, platform constraints, and best practices to keep in mind when authoring content in Activator 3. Consult these pages when designing complex emails, slides, or eDetailers, when troubleshooting unexpected rendering, or when preparing assets for upload.
These pages describe constraints that apply to the Activator 3 platform itself. Project-specific rules (Content Rules, Design System validation, MLR requirements) are defined per tenant and Design System.
Browser and rendering
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Supported Browsers — the browsers and versions Activator 3 is tested against.
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Why Content Spacing May Look Different in Activator Canvas vs. Preview — common rendering differences between the editor and preview, and how to interpret them.
Assets and file formats
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Supported Assets Formats — image, video, and document formats that can be uploaded to the Media Library.
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Supported Characters — characters allowed in filenames and asset names.
Email constraints
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Email Layout Design Best Practices — guidance for designing emails that render consistently across clients (Outlook, Gmail, Apple Mail).
MLR and reports
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Custom Report Screenshots for Slides with Nested Popup States — how to capture nested popup states correctly in the MLR PDF report.
Tenant-level configuration
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Tenant Configuration — what is configurable at the tenant level and how to request changes.
Related
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Email Limitations (in the Email channel section) — specific rendering and feature limits for email.
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Troubleshooting — symptom-based guidance for common issues.
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FAQ & glossary — answers to frequently asked questions and platform terminology.
If you encounter a constraint that isn't documented here, raise a Service Desk ticket so we can capture and publish it. See Get help (Service Desk).