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Old 07-03-2018, 16:07   #1
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Using mouse to zoom in OSX

I experience a problem with using the mouse to control the zoom. It is very sensitive and hard to control. The scale jumps appear very large. I have looked but cannot find a pref or other setting.

OpenCPN 4.8.2
Bitmap charts
Apple Wireless Mouse and wired mouse
Up to date Retina Laptop
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Old 07-03-2018, 16:13   #2
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Re: Using mouse to zoom in OSX

In preferences, under Display, check "Smooth Pan/Zooming". It helps make zooming and panning much more controllable.
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Old 07-03-2018, 18:17   #3
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Re: Using mouse to zoom in OSX

Thanks for your reply. I had tried that and am now guessing that it is partly to do with the scales of raster charts.

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Old 07-03-2018, 18:20   #4
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Re: Using mouse to zoom in OSX

Quote:
Originally Posted by simonmorice View Post
Thanks for your reply. I had tried that and am now guessing that it is partly to do with the scales of raster charts.

S
"Preserve scale when switching charts" checkbox on the same tab?
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Old 07-03-2018, 19:03   #5
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Re: Using mouse to zoom in OSX

Wrote it up in FAQ, added a few things.

https://opencpn.org/wiki/dokuwiki/do...ard_to_control

Check out the item below this FAQ

Charts jump while Using Follow Ship Offset, Look Ahead & North up Modes
=--Probably not the problem though.
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Old 08-03-2018, 06:30   #6
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Re: Using mouse to zoom in OSX

Thanks again for all the help. It is still difficult to control with the Apple Wireless Mouse - but less so with a wheel mouse. Makes it very difficult at the chart table in a lop. I guess time and attention will sort this out.
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