If you are working on a very fresh install of Ignition, your Vision Designer will have the filter for your properties set to "Basic" , find that filter and enable all properties to ensure you are seeing them all in Vision. (Also be sure you are reviewing the template definition, not an instance of the template, if you are wanting to tweak things like the colors)
Yes, the exchange is a free to use community driven resource collection. One of the most popular resources on the exchange is the Ignition 8 Demo Projects backup - the demo being a large Perspective Demo you can browse online - Perspective Demo.
I see that now, thanks, if I just have a few of properties I guess is because that resource just have a few public right? as example in the template I see the ARC WIDTH but not in the properties once the template is in the window, on the example below (image) then I can not change the width of each control that I insert in my window because the property is not there right?
You are working with a template, it is a central definition for a set of component(s) you are then inserting into a Window. Once in the Window, it is an instance of the template and the properties will be different.
You would edit the template definition in order to make changes, this allows it to be repeated and varied based on the parameters. You can add any parameters you need, to expose additional properties from the template definition. So you could have a new "ArcWidth" parameter, and allow access to that prop with a binding if it was necessary. But usually templates only need a small number of parameters for ids.
You would likely benefit from making a template from scratch with a different component, before working with the exchange resource. I'd recommend the above.