so go into minetest folder
then /user
now theres one file called "minetest" and another called "minetest.conf"
Basically all the conf file command to change thing are in the "minetest.conf older. theres alot of options:D
# This file is read by default from:
# ../minetest.conf
# ../../minetest.conf
# Any other path can be chosen by passing the path as a parameter
# to the program, eg. "minetest.exe --config ../minetest.conf.example"
#
# By default, all the settings are commented and not functional.
# Uncomment settings by removing the preceding #.
#
# Further documentation:
# http://celeron.55.lt/~celeron55/minetest/wiki/doku.php
#
# NOTE: This file might not be up-to-date, refer to the
# defaultsettings.cpp file for an up-to-date list:
# https://bitbucket.org/celeron55/minetest/src/tip/src/defaultsettings.cpp
#
# A vim command to convert most of defaultsettings.cpp to conf file format:
# :'<,'>s/\tg_settings\.setDefault("\([^"]*\)", "\([^"]*\)");.*/#\1 = \2/g
#
# Client and server
#
# Network port (UDP)
#port =
# Name of player; on a server this is the main admin
#name =
#
# Client stuff
#
# Key mappings
# See http://irrlicht.sourceforge.net/docu/namespaceirr.html#a54da2a0e231901735e3da1b0edf72eb3
#keymap_forward = KEY_KEY_W
#keymap_backward = KEY_KEY_S
#keymap_left = KEY_KEY_A
#keymap_right = KEY_KEY_D
#keymap_jump = KEY_SPACE
#keymap_sneak = KEY_LSHIFT
#keymap_inventory = KEY_KEY_I
# Go down ladder / go down in fly mode / go fast in fast mode
#keymap_special1 = KEY_KEY_E
#keymap_chat = KEY_KEY_T
#keymap_cmd = /
#keyman_console = KEY_F10
#keymap_rangeselect = KEY_KEY_R
#keymap_freemove = KEY_KEY_K
#keymap_fastmove = KEY_KEY_J
#keymap_frametime_graph = KEY_F1
#keymap_screenshot = KEY_F12
# Some (temporary) keys for debugging
#keymap_print_debug_stacks = KEY_KEY_P
# The desired FPS
#wanted_fps = 30
# If FPS would go higher than this, limit it by sleeping
# (to not waste CPU power for no benefit)
#fps_max = 60
# The allowed adjustment range for the automatic rendering range adjustment
#viewing_range_nodes_max = 300
#viewing_range_nodes_min = 25
# Initial window size
#screenW = 800
#screenH = 600
# Address to connect to (#blank = start local server)
#address =
# Enable random user input, for testing
#random_input = false
# Timeout for client to remove unused map data from memory
#client_unload_unused_data_timeout = 600
# Whether to fog out the end of the visible area
#enable_fog = true
# Enable a bit lower water surface; disable for speed (not quite optimized)
#new_style_water = false
# Enable nice leaves; disable for speed
#new_style_leaves = true
# Enable smooth lighting with simple ambient occlusion;
# disable for speed or for different looks.
#smooth_lighting = true
# Whether to draw a frametime graph (for debugging frametime)
#frametime_graph = false
# Enable combining mainly used textures to a bigger one for improved speed
# disable if it causes graphics glitches.
#enable_texture_atlas = true
# Path to texture directory. All textures are first searched from here.
#texture_path =
# Video back-end.
# Possible values: null, software, burningsvideo, direct3d8, direct3d9, opengl
#video_driver = opengl
# Unobstructed movement without physics, downwards key is keymap_special1
#free_move = false
# Continuous forward movement (for testing)
#continuous_forward = false
# Fast movement (keymap_special1)
#fast_move = false
# Invert mouse
#invert_mouse = false
# FarMesh thingy
#enable_farmesh = false
#farmesh_trees = true
#farmesh_distance = 40
# Enable/disable clouds
#enable_clouds = true
# Path for screenshots
#screenshot_path = .
# Amount of view bobbing (0 = no view bobbing, 1.0 = normal, 2.0 = double)
#view_bobbing_amount = 1.0
# In-game chat console background color (R,G,B)
#console_color = (0,0,0)
# In-game chat console background alpha (opaqueness, between 0 and 255)
#console_alpha = 200
#
# Server stuff
#
# Default game (default when creating a new world)
#default_game = mesetint
# Map directory (everything in the world is stored here)
#map-dir = /custom/map
# Message of the Day
#motd = Welcome to this awesome Minetest server!
# Maximum number of players connected simultaneously
#max_users = 20
# Set to false to allow old clients to connect
#strict_protocol_version_checking = true
# Set to true to enable creative mode (unlimited inventory)
#creative_mode = false
# Enable players getting damage and dying
#enable_damage = false
# Despawn all non-peaceful mobs
#only_peaceful_mobs = false
# A chosen map seed for a new map, leave empty for random
#fixed_map_seed =
# Gives some stuff to players at the beginning
#give_initial_stuff = false
# New users need to input this password
#default_password =
# Available privileges: build, teleport, settime, privs, shout
#default_privs = build, shout
# Whether players are transferred to client without any range limit
#unlimited_player_transfer_distance = true
# Whether to enable players killing each other
#enable_pvp = true
# Profiler data print interval. #0 = disable.
#profiler_print_interval = 0
#enable_mapgen_debug_info = false
# from how far client knows about objects
#active_object_send_range_blocks = 3
# how large area of blocks are subject to the active block stuff (active = objects are loaded and ABMs run)
#active_block_range = 2
# how many blocks are flying in the wire simultaneously per client
#max_simultaneous_block_sends_per_client = 2
# how many blocks are flying in the wire simultaneously per server
#max_simultaneous_block_sends_server_total = 8
#max_block_send_distance = 7
#max_block_generate_distance = 5
#time_send_interval = 20
# Length of day/night cycle. 72=20min, 360=4min, 1=24hour, 0=day/night/whatever stays unchanged
#time_speed = 72
#server_unload_unused_data_timeout = 29
#server_map_save_interval = 5.3
# To reduce lag, block transfers are slowed down when a player is building something.
# This determines how long they are slowed down after placing or removing a node.
#full_block_send_enable_min_time_from_building = 2.0
# Set to true to enable experimental features or stuff that is tested
# (varies from version to version, usually not useful at all)
#enable_experimental = false
and again this is stuff to put in your .conf file
