Regarding a resolution problem 3.5 inch TFT screen

Hi, I am having a problem with 3.5 inch TFT display. The code which I use show the display but the resolution of the screen is minimized. Full screen is not available. Please help me.
The code is in: Site verification

Unless the code is too long, please post it inline here, in code tags. The use of code tags is explained in the permanent threads at the top of the forum.

the code exceeded 9000 character that's why I used notepad

First off. Please ask questions on Public Forums. Do not use PM.

I frequent the Displays Forum. And happily answer questions about Displays.
I do not follow this Programming Forum. There are too many messages. Most of them are not about Displays.

If you have a sketch that is too big for pasting to a message, you can attach the file to your message.
Using a third party site is ok but remember that readers might be using a Tablet or phone. So use a clickable link e.g. Site verification

In your code you have included multiple library headers :

#include <TFT_HX8357.h>
#include <Adafruit_TFTLCD.h>
#include <Adafruit_GFX.h>
#include <MCUFRIEND_kbv.h>
void setup() {

As far as I know, the official Adafruit_TFTLCD does not support the ILI9481. But TFT_HX8357 and MCUFRIEND_kbv libraries do support ILI9481.

Adafruit_TFTLCD has been hacked mercilessly. Please post a link to the actual Adafruit_TFTLCD library you are using.
As a general rule. Only install approved libraries via the IDE Library Manager.

I suggest that you tidy up your code by writing a helper function instead of similar repeated sequences e.g.

void color_xy_msgs_2(uint16_t color, int x, int y, char *msg1, char *msg2)
  tft.fillRoundRect(60,50, 200, 70,10,BLACK);
  tft.fillRoundRect(60,50, 200, 70,10,color);

Note that all 3 libraries support GFX methods. So you do little more than change include, constructor() and begin() statements.

TFT_HX8357 has a User_Setup.h file
MCUFRIEND_kbv requires tft.readID() to identify the correct controller.

Please post a link to the actual display that you bought.

I suggest that you ask a Moderator to move this thread to the Displays Forum. (if you want me to reply)