first, on every image there is its name and I would like to suppress it ;
If you are creating your gallery with JuiceboxBuilder-Lite and would like to remove the image filenames from the titles in the caption area, go to 'Images -> Titles -> Use None' from the drop-down menu at the top.
secondly the title is a little superimposed on the image : could it be a little higher ?
This would be possible with Juicebox-Pro (but not with Juicebox-Lite, the free version) by setting galleryTitlePosition="TOP". This would position the gallery title in a top area above the main image (not superimposed over the top of it).
And thirdly, on every image, at the bottom, there is a grey band whose width is near one centimeter : could it be suppressed also ?
The grey band you refer to is the caption area (which in your gallery currently displays the image title and the image number).
If you wanted to hide the caption area and all its content, then you would need to use Juicebox-Pro and set captionPosition="NONE". Otherwise, you could set the caption area's background color to be completely transparent (captionBackColor="rgba(0,0,0,0)"). The caption content would still be displayed but the grey bar itself would no longer be visible. (Please note that captionBackColor is also a Pro option.)
SimpleViewer Support Team