I am using the windows version of seamly2d. I have attached a screenshot of the “about” screen. Two of the tools under the ARC category are really difficult to use. The reason is that the on screen help prompt in the lower left corner flashes momentarily on the screen then vanishes. The prompt shows properly for all other sub-functions. The ones that misbehave are the first (radius and angles) and last (eliptical).
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Yes I’m aware of the issue. Somebody else reported it here on the forums. I can’t remember if I fixed it or just looked into it. 
I will have to look back through the topics and see what I said . 
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If you do not fix the issue immediately, would it be possible to tell me the first and subsequent prompts for the eliptical tool. this would allow me to enter the appropriate inputs in the correct order and use the tool. Today was the first time I had occasion to need it which is how I found the issue
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“Tool::Arc - Elliptical: Select point of center of elliptical arc”
That’s it. Once you select the center the dialog opens.
BTW Now that I read that I can tell it’s legacy text. It’s just wrong. 
It should read:
"Tool::Arc - Elliptical: Select center point for elliptical arc
Besides “point of center” being totally wrong… You can’t select a center of an arc that doesn’t exist yet.. thus “center point for elliptical arc” is a more correct wording.
Ahhh it’s come back to me… I thought Ihad fixed the issue with the arc and ellipse when I fixed the Normalize Angle routine. Because the default values were throwing an error the dialog could not be validated… and becasue the dialog could not be validat8ed the tooltip was getting erased. I should note that a tool’s dialog class gets created in the background, depending on the dialog, and what steps need to be taken (as noted by the tooltips), it’s not visible until those selections are made and / or Enter pressed. So in the case of the Arc tools the default values of the radii, 1st angle, 2nd, and rotation are being validated as the dialog class is being created… and they fail almost immediately. Like I said I thought I fixed it in regards to default angles… but there’s stil the radii. 
Since they are empty they are invalid and the OK and Apply buttons are greyed out.
Solution should be as simple as giving the radii a default value… like 0 or better yet 1. Valdation error goes away, toolstips remain visible.
Or we could get messy and muck around with the math paser and dialog so it internally it treats an empty formula string as 0 when it evalutes a formula. Nah.
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