diff --git a/ExpCore/GuiParts/center.lua b/ExpCore/GuiParts/center.lua
index b2841129..2333dcbb 100644
--- a/ExpCore/GuiParts/center.lua
+++ b/ExpCore/GuiParts/center.lua
@@ -25,13 +25,20 @@ function center.add(obj)
     return obj
 end
 
--- used to get the center frame of the player, used mainly in script
+--- Used to get the center frame of the player, used mainly in script
+-- @usage Gui.center.get_flow(player) -- returns gui emelemt
+-- @param player a player indifier to get the flow for
+-- @treturn table the gui element flow
 function center.get_flow(player)
     local player = Game.get_player(player)
     return player.gui.center.exp_center or player.gui.center.add{name='exp_center',type='flow'}
 end
 
--- used to open any center gui
+--- Used to open a center frame for a player
+-- @usage Gui.center.open(player,'server-info') -- return true
+-- @param player a player indifier to get the flow for
+-- @tparam center string the name of the center frame to open
+-- @treturn boelon based on if it successed or not
 function center.open(player,center)
     local player = Game.get_player(player)
     Gui.center.clear(player)
@@ -43,13 +50,33 @@ function center.open(player,center)
     return true
 end
 
--- used to clear the center frame of the player, used mainly in script
+--- Used to open a center frame for a player
+-- @usage Gui.center.open_tab(player,'readme','rules') -- return true
+-- @param player a player indifier to get the flow for
+-- @tparam center string the name of the center frame to open
+-- @tparam tab string the name of the tab to open
+-- @treturn boelon based on if it successed or not
+function center.open_tab(player,center,tab)
+    local player = Game.get_player(player)
+    if not Gui.center.open(player,center) then return false end
+    local name = center..'_'..tab
+    if not Gui._get_data('inputs_button')[name] then return false end
+    Gui._get_data('inputs_button')[name].events[defines.events.on_gui_click]{
+        element=Gui.center.get_flow(player)[center].tab_bar.tab_bar_scroll.tab_bar_scroll_flow[name],
+    }
+    return true
+end
+
+--- Used to clear the center frame of the player, used mainly in script
+-- @usage Gui.center.clear(player)
+-- @param player a player indifier to get the flow for
 function center.clear(player)
     local player = Game.get_player(player)
     center.get_flow(player).clear()
 end
 
 -- used on the button press when the toolbar button is press, can be overriden
+-- not recomented for direct use see Gui.center.open
 function center._center.open(event)
     local player = Game.get_player(event)
     local _center = Gui._get_data('center')[event.element.name]
@@ -71,7 +98,8 @@ function center._center.open(event)
     player.opened=center_frame
 end
 
--- this is the default draw function if one is not provided
+-- this is the default draw function if one is not provided, can be overriden
+-- not recomented for direct use see Gui.center.open
 function center._center:draw(frame)
     Gui.bar(frame,510)
     local tab_bar = frame.add{
@@ -131,17 +159,6 @@ function center._center:draw(frame)
     frame.parent.add{type='frame',name='temp'}.destroy()--recenter the GUI
 end
 
-function center.open_tab(player,center,tab)
-    local player = Game.get_player(player)
-    if not Gui.center.open(player,center) then return false end
-    local name = center..'_'..tab
-    if not Gui._get_data('inputs_button')[name] then return false end
-    Gui._get_data('inputs_button')[name].events[defines.events.on_gui_click]{
-        element=Gui.center.get_flow(player)[center].tab_bar.tab_bar_scroll.tab_bar_scroll_flow[name],
-    }
-    return true
-end
-
 --- If deafult draw is used then you can add tabs to the gui with this function
 -- @usage _center:add_tab('foo','Foo','Just a tab',function)
 -- @tparam string name this is the name of the tab
diff --git a/ExpCore/GuiParts/inputs.lua b/ExpCore/GuiParts/inputs.lua
index d7526253..7639eab5 100644
--- a/ExpCore/GuiParts/inputs.lua
+++ b/ExpCore/GuiParts/inputs.lua
@@ -164,7 +164,7 @@ function inputs.add_button(name,display,tooltip,callbacks)
         local keys = {alt=event.alt,ctrl=event.control,shift=event.shift}
         local element = event.element
         local callbacks = button.data._callbacks
-        if is_type(callbacks,'function') then callbacks = {function(...) return true end,callbacks} end
+        if is_type(callbacks,'function') then callbacks = {{function(...) return true end,callbacks}} end
         for _,data in pairs(callbacks) do
             if is_type(data[1],'function') and is_type(data[2],'function') then
                 local success, err = pcall(data[1],player,mouse,keys,event)
diff --git a/ExpCore/sync.lua b/ExpCore/sync.lua
index 38551a6c..c67ff0e9 100644
--- a/ExpCore/sync.lua
+++ b/ExpCore/sync.lua
@@ -11,7 +11,8 @@ Discord: https://discord.gg/r6dC2uK
 local Sync = {}
 local Sync_gui_functions = {}
 
--- only used as a faster way to get to the ranking function
+--- Used as a faster way to get to the ranking function, overrides previous
+-- @usage Sync.set_ranks{name=rank_name}
 function Sync.set_ranks(...)
     Ranking._base_preset(...)
 end
@@ -237,25 +238,36 @@ Event.register(defines.events.on_tick,function(event)
     if (event.tick%time)==0 then Sync.update() Sync.emit_data() end
 end)
 
+--- Adds a emeltent to the sever info gui
+-- @usage Sync.add_to_gui('string') -- return trues
+-- @param element see examples before for what can be used, it can also be a return from Gui.inputs.add
+-- @treturn bolean based on weather it was successful or not
 function Sync.add_to_gui(element,...)
-    if game then return end
+    if game then return false end
     if is_type(element,'function') then
         table.insert(Sync_gui_functions,{'function',element,...})
     elseif is_type(element,'table') then
         if element.draw then table.insert(Sync_gui_functions,{'gui',element})
         else table.insert(Sync_gui_functions,{'table',element}) end
     else table.insert(Sync_gui_functions,{'string',element}) end
+    return true
 end
 
 -- Examples for Sync.add_to_gui
+-- adds a basic string to the table
 Sync.add_to_gui('Welcome to the Explosive Gaming comunity! This is one of many servers which we host.')
+-- adds a string that can have depentant values
 Sync.add_to_gui(function(player,frame)
     return 'This server will reset at: '..Sync.info().reset_time
 end)
+-- adds a string that can have depentant values
 Sync.add_to_gui(function(player,frame)
     return 'You have been given the rank '..Ranking.get_rank(player).name..' from our Discord'
 end)
+-- if readme is included then see addons/guis/readme.lua for more examples
 
+-- used to load the gui infomation when _G.Gui is not yet loaded
+-- internal use not recomend to be used
 function Sync._load()
     Gui.center.add{
         name='server-info',
@@ -303,6 +315,7 @@ function Sync._load()
     end}
 end
 
+-- opens the server info gui for all new joins except admins
 Event.register(defines.events.on_player_joined_game,function(event)
     local player = Game.get_player(event)
     if not player.admin and player.online_time < 60 then