Unable to reduce/enlarge Zoho Creator Charts in HTML View iFrame (Dashboard)

Unable to reduce/enlarge Zoho Creator Charts in HTML View iFrame (Dashboard)

I am trying to place eight individual ZC charts onto one consolidated dashboard view but the charts are not resizing properly. I am shrinking the iFrame pixel height and width appropriately on the Dashboard View, but the charts do not shrink; rather, they add a scroll bar and only display a small corner of each chart. Is there a way to zoom in/out on the ZC charts in an HTML view iFrame? I am able to do this through Zoho Reports, but the process is kludgy and difficult to implement and repeat properly.