Today I made a new .th2 drawing file and used a .png file as a background image. Not something I do very much these days, as I typically use .xvi files created PocketTopo files. The xvi images work just fine in XTherion.
But as described in the post in this link, https://www.mail-archive.com/[email protected]/msg06890.html, there are problems when using the mouse wheel to zoom if background images are .jpg or .png. Until now I have adopted a work around of only using the menu + and - zoom buttons where th2 files are linked to these. However for one projected elevation drawing, even the + and - controls are problematic. I think I accidentally used the mouse wheel before inserting the image. As a result the image is only aligned with the sketch at one particular zoom level. 144% in this case. There is also a problem with the image clipping. In the above example, if I zoom out one level, the drawing reduces, but the image does not change by the same amount. If I use the zoom wheel, the situation compounds and gets worse. So I have a situation where I can only align this drawing at one zoom level, and I have to be careful not to use the mouse wheel. Not really a problem in this case, as it is a trivial survey and scrap, but it is a significant issue for anyone who might still be regularly using scanned sketches for drawing. Is this something that someone knows how to address? I'm using Therion 5.4.1+f0c98ce (2018-03-03) Bruce
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