What do the tools in options panel( like Tag Bevel )in edit mode do?

I was trying to get to know everything in Blender and I came across the options tab in Edit Mode and there's whole bunch of options like Tag Seam, Tag Bevel etc.

I know how to use all the suffix functions (i.e every tool without "tag" ).But I am wondering if this has any specific function/usability.

So, if anyone has any idea can you please explain all those options(Tag Seam, Tag Sharp, Tag Crease, Tag Bevel)? Thanks.

• As far as I know those sound like the options in the W menu for use with the corresponding modifiers like Bevel, or Subsurf) – Duarte Farrajota Ramos May 17 '17 at 12:41
• Thanks for the response man.But could you please clarify,what purpose the tools/options in W menu serve when used with corresponding modifier? Lets take SubSurf modifier as example,the suitable options I see for them is Shade smooth and flat.But these only save the time and/or trouble of going back to object mode.Or is there some other use that I seem to not know about? – KnowledgeSeeker May 17 '17 at 13:46
• I've been testing here I could not figure out what those options are really for. I know tagging edges from the W menu is used in parallel with modifiers to specify different transformation values for different parts of the model. Say the Bevel Weight can make different edges beveled a different distance without requiring multiple Bevel modifiers. Different Crease values will change how smoothed an edge is with a Subsurf modifier – Duarte Farrajota Ramos May 17 '17 at 18:02

The options in the Options Panel for tagging edges are the same as the edges menu with only a slight difference that I can see. Most notably in Bevel and Crease, in that the weight added is always at 1.
• Crease marks edges for use with subsurf, with a weight of 1
• Bevel marks edges for use with Bevel modifier, with a weight of 1