【Charts/Canvas】Suggestion: 「Manual Save Button」in Addition to Auto-Save

Currently, Charts and Canvas save changes automatically. We would also like to request a manual save function, such as a "Save" button.

Background
We have seen work being lost in both Charts and Canvas:

1. Charts: the calculation source disappears As described in the related idea, Undo/Back Button for Calculation Editing, users sometimes find that their calculation source has suddenly disappeared while they are building complex formulas. When this happens, they have to start over from the beginning.

2. Canvas: entered text is not saved As we reported in this community post, text entered on a Canvas sometimes disappears when we check it later. The change is also missing from the Canvas history, so we cannot keep a record. This has happened on several Canvases for some time.

Unfortunately, these issues still occur. In some cases, the work does not seem to have been auto-saved at all, so everything is lost. This is very discouraging for users who have spent a lot of time and effort on their work.

Proposal
We suggest adding a manual save function (for example, a "Save" button) in addition to auto-save. This would allow users to:

• Know for sure that their work has been saved
• Reduce the risk of losing work, especially when editing complex calculations or Canvas content

We believe this feature, together with the undo/back function suggested in the related idea, would greatly improve the reliability of Charts and Canvas and give users more confidence in them.

Thank you for your consideration.