How do I let a player open a gui when in a certain proximity using the key "E"?

So since you didn't attempt this, I'm just going to explain what you need to look into and some pseudocode of how to do it.

You need to use the UserInputService in a local script inside starter scripts to make an anonymous function that detects if the player presses E when they are not typing in chat. Once you have that established, you will need to check if the player is within your set proximity:

Use (PlayerPosition-partPosition).Magnitude to get the distance of the player to the part and check if the proximity is greater than that, if so, then you would enable the GUI.

Also, if you want them to be able to close the GUI, have an if then else end block handling the GUI enabling like this:

--THIS IS PSEUDOCODE, IT WILL NOT WORK
function detectKeypress()
    local GUI = yourGUI
    if not GUI.enabled and proximity>distance then
        GUI.enabled = true
    else
        GUI.enabled = false
    end
end

for your solution i have made a model which i will link you in case you cant figure out how to do this but i also want you to learn a little even tho that sounds stupid it will help you in scripting. so to start you want to make a part in workspace and make it as big as you want and consider making it about 6 studs tall anchor, and then Cancollide = false. next make it invisible by making transparency 1. then insert a server script into it and type in this code:

script.Parent.Touched:connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") then
        local plr = workspace[hit.Parent.Name]
        local player = game.Players:GetPlayerFromCharacter(plr)
        player.guis.egui.Value = true
    end
end)

script.Parent.TouchEnded:Connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") then
        local plr = workspace[hit.Parent.Name]
        local player = game.Players:GetPlayerFromCharacter(plr)
        player.guis.egui.Value = false
        player.PlayerGui.egui.Frame.Visible = false --change egui.Frame to your screenGui name and frame name
    end
end)

what this code does is when the player touches the part it gives it the persons boolvalue a true value(which i will get to in a second). and the bool value becomes false when the player leaves the area or untouches it or isnt touching it anymore.

next you want to insert a script into serverscriptservice with the following code:

game.Players.PlayerAdded:connect(function(player)
    local guis = Instance.new("Folder")
    guis.Name = "guis"
    guis.Parent = player
    local egui = Instance.new("BoolValue", guis)
    egui.Name = "egui"
end)

this script creates a bool value which when its true it lets the person open the gui and when its false it doesnt let the person open the gui, also it only becomes true when the person is touching the part we scripted first.

next insert a local script into starterPlayer, StarterPlayerScript with this code:

local plr = game.Players.LocalPlayer
local char = plr.Character


game:GetService("UserInputService").InputBegan:Connect(function(input, event)
    if input.KeyCode == Enum.KeyCode.E and plr.guis.egui.Value == true then

        if script.Parent.Parent.PlayerGui.egui.Frame.Visible == false then--change egui.Frame to your screenGui name and frame name on all of these lines that make the gui visible or uninvisible


            script.Parent.Parent.PlayerGui.egui.Frame.Visible = true
        elseif script.Parent.Parent.PlayerGui.egui.Frame.Visible == true then
            script.Parent.Parent.PlayerGui.egui.Frame.Visible = false
        end
    end
end)

this code is played when the person is touching the part, has the boolvalue on true and presses E. this script then gets the gui and makes it either visible or invisible.

hope this helped you :)

also here is the link if this was too confusing \/ \/ \/ \/ \/

https://web.roblox.com/library/4007653976/Area-GUI

just use magnitude, or place a touched object around the block

this is for the touched object (Server Script)

script.Parent.Touched:Connect(function(hit)
local player = hit.Parent:GetPlayerFromCharacter()
player.PlayerGui. <-- insert userinput script.Disabled = false
end)

script.Parent.TouchEnded:Connect(function(hit)
local player = hit.Parent:GetPlayerFromCharacter()
player.PlayerGui. <-- insert userinput script.Disabled = true
end)

Key code script vvv (LocalScript)

local UserInput = game:GetService("UserInputService")

UserInput.InputBegan:Connect(function(input)
 if input.Keycode == Enum.KeyCode.E then
game.Players.Localplayer.PlayerGui. <-- put Gui to make visible.Visible = true
end)