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Why Is the Add Timeline Button Disabled in Microsoft Project?

Aamir Naveed Akram Oct 9, 2026 870 views

Question details

The user is unable to add new timelines in Microsoft Project because the Add Timeline button has become greyed out or completely disabled.

Why Is the Add Timeline Button Disabled in Microsoft Project?

Product: Microsoft Project
Device & OS: not provided
Scenario: Attempting to add multiple timeline bars to the Timeline view for complex project visualization.
Observed behavior: The 'Add Timeline' button becomes unavailable, preventing the addition of any more timeline bars to the current view.

Before you start

Verify that you are currently in the Timeline view and count the number of separate timeline bars that are already displayed on your screen.

Solution 1Recommended

Manage the 10 Timeline Maximum Limit

Microsoft Project enforces a strict limit on the number of timelines you can display at once. Freeing up space will re-enable the button.

Microsoft Project supports a maximum of 10 timelines in a single Timeline view. Once you reach this hardcoded limit, the software automatically disables the Add Timeline button. To add a new timeline, you must first remove an existing one.

Count active timelines

Look at your current Timeline view and count the number of timeline bars present. If there are 10, you have reached the maximum allowed.

Remove a timeline bar

Right-click on an existing timeline bar that you no longer need to display and select 'Remove from Timeline' from the context menu.

Add the new timeline

Once the count drops to 9 or fewer, navigate to the Format tab. The 'Add Timeline' button will be re-enabled, allowing you to insert the new timeline.

No Data Loss: Removing a timeline from the Timeline view does not delete the tasks or data from your actual project schedule.

Solution 2

Copy and Reset for Extra Timelines

If your project requires presenting more than 10 timelines, you can export the current view and reset it to build more.

Free Microsoft Office alternative

Plan Your Projects with WPS Spreadsheet Templates

While Microsoft Project has specific visual limits and requires a costly subscription, WPS Office provides a free, lightweight, and versatile alternative for project management. You can easily create unlimited project timelines using highly customizable Gantt chart templates.

1. Open WPS Office: Launch WPS Office and click on 'Spreadsheet' on the home screen.
2. Access the Template Library: Navigate to the 'New' tab and click on 'Templates'. Search for keywords like 'Gantt' or 'Timeline'.
3. Customize your project: Download your preferred template and input your project data to generate beautiful timelines without restriction.

Completely free and lightweight alternative to Microsoft Office.Seamlessly compatible with Microsoft Excel (.xlsx) formats for easy sharing.Access hundreds of free built-in project management and Gantt chart templates.No hard limits on the number of timeline rows or visual elements you can create.

Frequently Asked Questions

Can I increase the maximum timeline limit in Microsoft Project?

No, the limit of 10 timelines in the Timeline view is hardcoded into the architecture of Microsoft Project and cannot be increased through advanced settings or registry edits.

How do I remove a task from a timeline without deleting it from the project?

Right-click the specific task directly on the timeline bar and select 'Remove from Timeline'. The task will remain fully intact in your project schedule and Gantt chart but will no longer clutter the Timeline view.

Is there a way to export my timelines to an email or presentation?

Yes. Click anywhere on the timeline, navigate to the Format tab under Timeline Tools, select 'Copy Timeline', and choose either 'For Email', 'For Presentation', or 'Full Size' depending on your destination.

Office Quick Solutions