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<p>I have the same problem, in both 5.4.0 and 5.4.1 I think.<br>
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<p>Thanks, Bruce, for a god description.<br>
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<p>Torstein Finnesand<br>
Norway<br>
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<div class="moz-cite-prefix">Den 21.06.2017 10.40, skrev Bruce
Mutton via Therion:<br>
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<p class="MsoNormal">Hello<o:p></o:p></p>
<p class="MsoNormal">I have an old paper survey, so am doing
some old school map drawing over a scanned background sketch.
My first for a few years.<o:p></o:p></p>
<p class="MsoNormal">I have noticed that XTherion seems to not
be able to display the background sketch once you have used
the mouse wheel to zoom. The sketch just vanishes, even
though everything looks OK.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Using the magic of version control I can
see that the only significant change that XTherion makes to
the dataset is that the ##XTHERION## variable is no longer one
of the present values.<o:p></o:p></p>
<p class="MsoNormal">ie 100 has changed to 62 in response to the
mouse wheel zoom.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img style="width:8.2812in;height:3.9895in"
id="Picture_x0020_1"
src="cid:part1.B582B6FD.8A703B69@gmail.com" class=""
height="383" width="795"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There are no problems if I use xvi file
sketches as generated from PocketTopo, so it is just a bitmap
thing I suppose.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If I manually change the value above back
to 100, the image displays just fine.<o:p></o:p></p>
<p class="MsoNormal">The + - zoom button on the interface work
just fine as well.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using 5.4.1 - 88c8a06<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Mouse wheel zoom is a nice feature, so it
would be worth finding a fix for this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Bruce<o:p></o:p></p>
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