Update all slide master's and layout's footers

Question

Trying to create a macro to quickly enter in project names to ppt footers. I can only get the top level slide master to accept the input title. I've tried looping through the other slide master layouts with the new footer info but I keep getting errors at the line to write text to the footer in the For loop

    Sub footchange()

    Dim myValue As Variant
    Dim sld As Slide

    myValue = InputBox("Enter Presentation Name")

    Set mySlidesHF = ActivePresentation.SlideMaster.HeadersFooters

    'Add name to slide master footer
    With mySlidesHF
        .Footer.Visible = True
        .Footer.Text = myValue + "    |   Confidential © 2020"
        .SlideNumber.Visible = True  
    End With

    'Add name to slide master layouts footers
    For Each sld In ActivePresentation.Slides
       With sld.HeadersFooters
            .Footer.Visible = True 
            .Footer.Text = myValue + "    |   Confidential © 2020"
            .SlideNumber.Visible = True
        End With
    Next

Answer 1

I was able to update all the master slides/layouts by adding a 2nd nested loop for the layouts in each master slide:

Sub footchange()

Dim myValue As Variant
Dim sld As Slide

'Add design and layout variables
Dim oMaster As Design
Dim cLay As CustomLayout

myValue = InputBox("Enter Presentation Name")

'Just to show you how many Masters you have
Debug.Print ActivePresentation.Designs.Count

'Loop through them
For Each oMaster In ActivePresentation.Designs

'Use actual Design
Set mySlidesHF = oMaster.SlideMaster
Set myLayoutsHF = oMaster.SlideMaster.CustomLayouts


'Add name to slide master footer
With mySlidesHF.HeadersFooters
    .Footer.Visible = True
    .Footer.Text = myValue + "    |   Confidential © 2020"
    .SlideNumber.Visible = True
End With

'Add name to layouts
For Each cLay In myLayoutsHF
    With cLay.HeadersFooters
        .Footer.Visible = True
        .Footer.Text = myValue + "    |   Confidential © 2020"
        .SlideNumber.Visible = True
    End With
Next cLay

Next oMaster


End Sub