How to interpolate several variables do create a profile in 3D analyst

[RuiRibeiro]

How can I create a line over a background image in order to interpolate the terrain in 3D analyst (10.4) to create several profile graphs, and how can I start interpolating the terrain in the same point for 3 different variables? Thanks

[DanPatterson_Retired]

have you seen the interactive profile toolset in the 3D analyst toolbar there are several offerings of what you can generate

Fundamentals of creating profile graphs—Help | ArcGIS for Desktop for example

Using the Point Profile interactive tool—Help | ArcGIS for Desktop

Creating a profile graph from digitized features of a surface—Help | ArcGIS for Desktop

Using the interactive Terrain Point Profile tool—Help | ArcGIS for Desktop

[RuiRibeiro]

Yes I know how to create a profile.

My doubt is how can i start different interpolation lines in the same point, and not zooming a lot so that 3 interpolation lines are somewhat precises.
I need a comand like OSNAP in autocad so that I can select a precise point.

Regards