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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But as described in the post in this link, <a href="https://www.mail-archive.com/therion@speleo.sk/msg06890.html">https://www.mail-archive.com/therion@speleo.sk/msg06890.html</a>, 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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><img border=0 width=1134 height=304 style='width:11.8125in;height:3.1666in' id="Picture_x0020_1" src="cid:image001.png@01D3BFC9.48F0D1F0"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In the above example, if I zoom out one level, the drawing reduces, but the image does not change by the same amount.<o:p></o:p></p><p class=MsoNormal><img border=0 width=1071 height=260 style='width:11.1562in;height:2.7083in' id="Picture_x0020_2" src="cid:image002.png@01D3BFC9.E9E0EC80"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is this something that someone knows how to address?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m using Therion 5.4.1+f0c98ce (2018-03-03)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Bruce<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>