My recommendation would be to implement a global module similar to the one below:
Public Sub ApplyGlobalFormTheme()
    Dim obj As AccessObject, frm As Form, ctl As Control
    Dim BackColor As Long, ForeColor As Long, BorderColor As Long, ButtonBackColor As Long

    Const cFontName As String = "your font"
    Const cFontSize As Long = 10
    BackColor = RGB(255, 255, 255)          
    ForeColor = RGB(32, 32, 32)            
    BorderColor = RGB(180, 180, 180)        
    ButtonBackColor = RGB(240, 240, 240)

    For Each obj In CurrentProject.AllForms

        DoCmd.OpenForm obj.Name, acDesign
        Set frm = Forms(obj.Name)

        frm.FontName = cFontName
        frm.FontSize = cFontSize

        frm.Detail.BackColor = RGB(248, 248, 248)

        For Each ctl In frm.Controls

            On Error Resume Next

            Select Case ctl.ControlType

                '==================================
                ' TextBox
                '==================================
                Case acTextBox

                    ctl.FontName = cFontName
                    ctl.FontSize = cFontSize
                    ctl.BackColor = BackColor
                    ctl.ForeColor = ForeColor
                    ctl.BorderColor = BorderColor
                    ctl.BorderWidth = 1
                    ctl.BorderStyle = 1
............................

using a Select Case statement, you can configure the settings of controls like textboxes, listboxes, comboboxes, etc., within a single public sub. It's an approach I prefer over the template form method.

That looks like a handy tip, Monica. Setting the defaults in Options is definitely easier than manually fixing every new control.

Alkan's approach is useful too if you need to apply a consistent theme to forms you already have. Just be careful with a routine that opens and modifies every form automatically - make a backup first.

Daniel over at Devhut also has a nice little couple videos and articles on subclasses forms. By creating an class module then calling it in every form you can define appearance and behavior of all basic form functions from one class module. Including event handling.