SUMMARY
There have been cases where the orthographic camera cannot be controlled or jitter occurs when the camera is moved. This behaviour can happen when an alembic geometry is imported into Mari.
MORE INFORMATION
An alignment compatibility problem between the camera of the alembic file and Mari's default camera may be the issue. You just need to reset the camera to get normal movement. To reset the camera, from the top menu select Camera > Reset Camera:
NOTE: More information about the Camera Reset can be found here:
Q100279: Differences between 'Reset navigation settings to their default' and 'Reset Camera'
FURTHER READING
If you're experiencing a different viewport issue, the following article may help you resolve it:
Q100278: What to do if the View becomes empty or the geometry disappears
FURTHER HELP
If you are still experiencing difficulties please create a support ticket and provide us with the information requested in this article:
Q100090: Information to send Support when reporting a Mari issue
For more information on how to open a Support ticket, please refer to this article:
Q100064: How to raise a support ticket
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