How to divide the line on an arch

I am right clicking my arch so that I can divide the line however the only option is to explode. It will not let me divide the arch until I explode it. Can someone please help?

You could change the number of segments first in Entity Info, then explode the curve to get it equally divided.

Draw a chord line at the arch base. Then draw a perpendicular line from the midpoint of the chord line.

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The right click divide option isn’t available in 2022, but is in 2023.

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Thank you! I downloaded the new version and it works.