How to add more than 3 columns in editable grid?

@ramyad Understood, I would like to suggest to refrain from choosing multiple items at a time to provide comments against. The reason why I am saying that you should refrain from taking action on multiple items is,
a. The Appian version which you are working on doesn't have a capability to provide editable grid in Tempo.
b. The Appian version which you are working on doesn't have a capability to generate components dynamically in Tempo. (For instance, in the latest versions we can generate components on need basis.)

So stick with updating one record at a time, and this would be the only solution until and unless you go for an upgrade.

Else an excel file which contains the data already present in grid, and an extra column for for capturing the comments should be fine. But I would like to suggest you to go ahead with updating one record at a time as long as the client is happy with it.

And to reiterate what myself or @Myles Weber has said earlier, please do look at the possibility of upgrading the version as this might solve your design issues.

@ramyad Understood, I would like to suggest to refrain from choosing multiple items at a time to provide comments against. The reason why I am saying that you should refrain from taking action on multiple items is,
a. The Appian version which you are working on doesn't have a capability to provide editable grid in Tempo.
b. The Appian version which you are working on doesn't have a capability to generate components dynamically in Tempo. (For instance, in the latest versions we can generate components on need basis.)

So stick with updating one record at a time, and this would be the only solution until and unless you go for an upgrade.

Else an excel file which contains the data already present in grid, and an extra column for for capturing the comments should be fine. But I would like to suggest you to go ahead with updating one record at a time as long as the client is happy with it.

And to reiterate what myself or @Myles Weber has said earlier, please do look at the possibility of upgrading the version as this might solve your design issues.