Map layers that appear when opening web map app

[BrandonWotachek]

How do I set what layers/features I want to appear when a web mapping app is opened by the user?  I have then organized in layer widgets and I only want certain ones to appear when the user opens the app.  I have searched high and low, but cannot find guidance that works for this.  I am assuming it is something very easy and I am just not seeing where this can be set.  

Thanks much.

[HelenCooper]

If you save the relevant web map with the relevant layers switched on, that should come through to the app when it opens.

[ewcrutcher]

I have this same question. I would like the ap to open to specific layers every time the ap is opened. Not to whatever the last saved view was by me or another user.