Examples in widget demo, listed under

Canvases
1. The canvas item types.
2. A simple 2-D plot.
3. Text items in canvases.
4. An editor for arrowheads on canvas lines.
5. A ruler with adjustable tab stops.
6. A building floor plan.
7. A simple scrollable canvas.
8. Tiles and transparent images.
[download]

You can find same with

perl -MTk -le " print Tk->findINC( shift ) "  demos/widget_lib/items.p
+l
perl -MTk -le " print Tk->findINC( shift ) "  demos/widget_lib/style.p
+l
[download]

style.pl uses tags to apply font/color... to bunches of text tagged with a certain style... other files ( plot.pl ruler.pl ctext.pl transtile.pl cscroll.pl floor.pl arrows.pl ) demo stuff too

https://metacpan.org/pod/Tk::Canvas#canvas--bind-tagOrId--sequence---callback

https://metacpan.org/pod/Tk::Canvas#canvas--bbox-tagOrId---tagOrId--tagOrId

For more examples Super Search for site:perlmonks.org Tk Canvas bind bbox same as you would for Tk Canvas Scroll

Ex Determine canvas object under click (Tk)