How would you change the player's fall speed?

Hi, I was trying to make it so that when the player is make it so that the player's jump height would stay the same, but if they press and hold space while midair, they would have a lighter fall aka reach the ground slower. This is what I have so far client

		elseif inputObject.KeyCode == Enum.KeyCode.Space then
			if player.Character.Humanoid.Jump == true then
				floating:FireServer("start")
			end
		end
	end)
		UIS.InputEnded:connect(function(inputObject)
			if inputObject.KeyCode == Enum.KeyCode.Space then
				floating:FireServer("stop")
			end
		end)

server

floatingevent.OnServerEvent:connect(function(player,startorstop)
	if script.Parent.Parent:FindFirstChild("Humanoid").Torso:FindFirstChild("floater") then
		floater = script.Parent.Parent:FindFirstChild("Humanoid").Torso:FindFirstChild("floater")
	else
		floater = Instance.new("BodyForce", script.Parent.Parent:FindFirstChild("Humanoid").Torso)
		floater.Name = "floater"
	end
	if startorstop == "start" then
		floater.Force = Vector3.new(0,game.Workspace.Gravity,0) * script.Parent.Parent:FindFirstChild("Humanoid").Torso:GetMass()* 2.5
	end
	if startorstop == "stop" then
		floater.Force = Vector3.new(0,0,0)
	end
	script.Parent.Parent:FindFirstChild("Humanoid").FreeFalling:connect(function()
		floater = script.Parent.Parent:FindFirstChild("Humanoid").Torso:FindFirstChild("floater")
		floater.Force = Vector3.new(0,game.Workspace.Gravity,0) * script.Parent.Parent:FindFirstChild("Humanoid").Torso:GetMass()* 2.5
	end)
end)

The problem with the script is that it alters the player's jump height and not the player's fall speed.

Create a BodyForce only when the character's HumanoidStateType is Enum.HumanoidStateType.Freefall, then delete it when it gets changed to anything else.

Also, you can add the capability you are talking about by changing the body force's Force whenever the space button is pressed using ContextActionService.

local character = player.Character -- the character
local humanoid = character.Humanoid -- the humanoid of the character

local function createBodyForce(character)
	-- function to make a body force here
	-- also have a function here to "listen" for a space push/hold. 
	-- pseudocode:
	if space held or space pushed then
		bodyForce.Force = some non-zero Vector3
	else
		bodyForce.Force = Vector3.new(0, 0, 0)
	end
end

local function destroyBodyForce(character)
	-- function to destroy a body force here
end

humanoid.StateChanged:Connect(function(old, new)
	if new == Enum.HumanoidStateType.Freefall then
		createBodyForce(character)
	else
		destroyBodyForce(character)
	end
end)