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@Robert Dostal maintained. You first have to select the older Viz charts.
This can be done when selecting a Viz go to the right corner of the Viz select menu and select Charts.
After selecting a correct line Chart you have to old trusty Line options back.
Its not ideaal to my inderstanding. why upgrade to 11.1 / 11.2 and still use the old 10 charts but he, that another story.
On the screenshot,
more details hope this solves your problem.
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Maarten den Dunnen
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Original Message:
Sent: Tue August 17, 2021 01:06 PM
From: Layne Leach
Subject: Chart Line Style in 11.1.7
Thanks Maarten, but I only have two options under LINE:

Where do you click to get the other options?
Thanks again.
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Layne Leach
Original Message:
Sent: Tue August 17, 2021 11:49 AM
From: Maarten den Dunnen
Subject: Chart Line Style in 11.1.7
To my quick scan, you can only modify the thickness of the lines, when using the older Charts variant.
The newer the viz engine, the fewer options you get to work with....
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Maarten den Dunnen
Original Message:
Sent: Tue August 17, 2021 10:30 AM
From: Layne Leach
Subject: Chart Line Style in 11.1.7
I have a simple Line Chart that I am trying to change the line style for, I'm trying to change to a dashed line and change the thickness. Where is the Series Line Style control hidden in v11.1.7?
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Layne Leach
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#CognosAnalyticswithWatson