Maybe with AutoScale checked, Excel feels a duty to recalculate the font
size. At least it returns to normal when you select the chart.

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"hmm" wrote in message
...
Sometimes text boxes on charts display a very large font size; only when
selecting the chart will it be shown as the size I set it to (something
like
18). It seems to happen when Auto-scale fonts is checked for the chart,
which is hard to understand because I am not resizing the charts!