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https://issues.apache.org/jira/browse/NIFI-1758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15238779#comment-15238779
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Pierre Villard commented on NIFI-1758:
--------------------------------------

It seems this is not limited to process group. I observed the same issue for 
processors, input/output ports, etc.

I am not a specialist but I think it'd just require the following modification:

{code:title=nf-canvas-all.css|borderStyle=solid}
textarea {
    overflow: scroll;
}
{code}

instead of

{code:title=nf-canvas-all.css|borderStyle=solid}
textarea {
    overflow: hidden;
}
{code}

I let web gurus have a look into this one.

> Unable to scroll in the Comments field when configuring process group
> ---------------------------------------------------------------------
>
>                 Key: NIFI-1758
>                 URL: https://issues.apache.org/jira/browse/NIFI-1758
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core UI
>    Affects Versions: 0.6.0
>            Reporter: Andrew Lim
>            Priority: Minor
>
> When configuring a process group, the Comments field allows a large amount of 
> text to be entered or pasted in.  The size of the comments field displays 
> about 6-7 rows (depending on what web browser is being used).  However, 
> scrolling is not allowed for that field, so the user is unable to easily see 
> or edit the values in the field.
> A workaround is to use the keyboard arrow keys.



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