Changing Properties Of Groups

Is There A Way To Change All Child Properties?

Like To Change All Parts Anchor Off In A Folder?

Loop through the folder and change their properties:

local Folder = pathtofolderhere

for i, v in pairs(Folder:GetChildren()) do -- This will loop through all of the children of the folder.
   -- v is a child of Folder, change v's properties.
end

Just loop through each child and change the property:

local folder = ...

for _, part in pairs(folder:GetChildren()) do
    if part:IsA("BasePart") then
        part.Anchored = false
    end
end