You are able to set DPI for exporting diagrams to PNG/JPEG.

- How to set DPI
1. Go to [Tool] - [System Properties] and select [Image] from list appears in the left
2. Specify the number in the [Resolution to export a diagram to PNG, JPEG files as a bitmap image (DPI)]




* The default setting is 96 DPI
* It needs to be more than 72. If you specify smaller, it will not apply.

3. Click [Apply] and then [OK]

e.g. Exporting a diagram with 10 classes in with DPI specified
- 72, results in exporting to 660 x 500 pixel image
- 120, results in exporting to 1100 x 833 pixel image

Change the DPI to produce diagram images depending on the use of them.

Cheers,
Satomi