# Can't access GanttProject 2.8.10

**URL:** <https://help.ganttproject.biz/t/cant-access-ganttproject-2-8-10/1255>\
**Category:** GanttProject Desktop Support\
**Created:** [February 21, 2019, 12:19pm UTC](https://help.ganttproject.biz/t/cant-access-ganttproject-2-8-10/1255 "2019-02-21T12:19:44Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![DmitryBarashev](https://help.ganttproject.biz/user_avatar/help.ganttproject.biz/dmitrybarashev/32/406_2.png) [@DmitryBarashev](https://help.ganttproject.biz/u/DmitryBarashev)\
**Post date:** [February 25, 2019, 1:51pm UTC](https://help.ganttproject.biz/t/cant-access-ganttproject-2-8-10/1255/6 "2019-02-25T13:51:33Z")

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In this dialog black/gray colors mean that column is currently shown or hidden. You can select gray rows in the list and once they are selected, “Show selected” button makes them visible in the table. It might not be the best UX, but it has been working this way in GanttProject for years.

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_[View the full topic](https://help.ganttproject.biz/t/cant-access-ganttproject-2-8-10/1255)._