I stepped away from the problem until we were able to upgrade to TChart v2017.22.170619, where the Resize retains the correct "stock" mark positions. But it still doesn't retain custom mark positions correctly. The TScrollbar also does not handle custom mark positions correctly. The mark still attac...

Hmm. Turns out I was using 8.06, but even after I installed 8.08, the resize doesn't work. After the install, my paths all appear to point to 8.08. I am using D2010, not D7. It seems unlikely that is the source of the problem, but I don't know what else?

I have tried it, and when you resize the form, the marks don't move, while the rest of the chart resizes. This is because all values in the XOffset and YOffset arrays are still zero; there have been no mouse clicks. We are currently using TeeChart Pro v8.08. I tried the attached example in version 2...

I've found several posts that explain how to display the correct custom mark positions when zooming or scrolling a chart. For example: http://www.teechart.net/support/viewtopic.php?f=3&t=15468 In this post and any others related to custom mark position updating, the answer seems to depend on using T...