Over time working on an image, sizes that were set change without me directly doing anything to them.

Stroke width also changes. Is there a way to keep the width from changing?

Yes, I think I know what you're talking about. On the Selection tool control bar is a button "When scaling objects, scale the stroke width by the same proportion". Looks like:

There may be times when you want the stroke width to be scaled, and other times when you don't. Most of the time, I don't want my stroke width to change, if I scale an object, so most of the time, the button isn't engaged. But every now an then, if I'm drawing something very small, rather than zooming (being lazy) I'll just draw it big. Then when finished, I scale it down to the very small size I need (like an icon, say 20 to 40 px). Suddenly the stroke takes up half the entire icon area, because I forgot to click that button first.

That might not be the whole problem you're having though. I'm not sure about: "....sizes that were set change without me directly doing anything to them." So if using that button doesn't help, could you give us more details?

Working on an image can trigger size changes depending on your workflow.

If you use strokes and scale the objects at a point, the width will change of it if this icon is toggled in, resulting in a larger bounding box, if you haven't set in the preferences to use a geometric bounding box before (Shift+Ctrl+P).

Rotating objects can also bring you "inconsistent results", most notable if you rotate a circle shaped path (which has four nodes).
The Bézier curves used to define the paths cannot be exactly circular, so by rotating such a circle varies the bounding box size.

If you use Boolean operations, like subtract, the resulting path is recalculated, and nodes can move a slight bit.
You can set higher accuracy in the prefs. (In 0.48 that rounding error could produce 0,2 px as far as I can see it, 0.91 is improved a lot.)


If you scale a group, the object's inside will be scaled too, preserving the visual appearance -meaning, stroke width will change.


Without knowing what/how exactly you work on your image, I cannot give a more focused suggestion.

Thanks for all the info. I am familiar with scaling strokes. One of the times the changing happens is when I specify a size. This happens a lot - I type in the size on the tool bar after selecting a shape, move to the next box to enter a number, and the first number changes. I return to the box, change it back, leave the box and the number changes again. ???

You change the size of the visual bounding box of the object, containing the stroke width --->object gets resized --->oh wait, you don't want to scale the stroke, let's change it back to its original values --->visual bounding box enlarges.

That is how it works, if you use visual bounding box and scaling the stroke widths disabled.


Workarounds, as suggested above:
a) change to geometric bounding box
b) change to scale stroke when resizing objects
c) put object inside a group and scale the group instead

Or maybe you have the scaling in proportion enabled? It's the tiny lock icon between the H and the W fields.

Although what you're describing doesn't sound exactly like what having that button engaged would be. Hhmmm....

Ok, when you type a number in the W or H field, you need to either click on the canvas or click in the same field or another field, or hit Enter, for that change to take effect.

So you type a number, and then when you click in the other field, that first number should stay the same as you typed it. Hhmmm....

OMG! Yes, when I have the lock button engaged, I'm seeing this exact same behavior! This must be new in 0.91. I've never seen it before. And I use this technique quite often! I'm going to post to the user mailing list, to find out if it's already been reported.

Hhmm.... It doesn't always happen though. I happened to be testing on a Star shape with non-zero randomization option. I think this might be related to the randomize option. If I make star with default options (randomize = 0), this problem doesn't happen. Neither if I draw a shape with Pen (in regular mode).

Or I guess this might also happen on an object if you drew it with Pen or Pencil in Spiro Spline mode. Edit -- no, doesn't happen

What kind of object are you seeing this happen on glasslady? Can you give us a sample SVG file, with an object that shows this problem?

Hhmm.... now not happening anymore -- ??? Still testing....

Edit
With these settings, it always happens in a new blank doc. (for me) 0.91, 32-bit, Win7, 64-bit

-- Star shape with 6 corners, spoke ration 0.5, rounded 0.3, randomize 0.09
-- add fill, remove stroke
-- engage the scale in proportion option (lock the lock icon on the Selection control bar)
-- change the W value
-- Enter (or click in another field or on the canvas)
-- W value changes to something different than what you entered

After creating several different kinds of objects with different tools, and testing, when I come back to the first star which showed the behavior -- then it's not showing the behavior anymore. So I'm not sure what's causing it to start working normally.

So far, it's only stars with those settings (or similar settings) that's showing the problem (Edit - for me).