const char myText[] PROGMEM = {"more text"};
int textSize = (sizeof(myText) / sizeof(myText[0])) - 1; // find the text length, not EOL

void setup() {
  Serial.begin(115200);
  for (byte i = 0; i < textSize; i++) {
    char myChar = pgm_read_byte(myText + i); // "_near" makes the relative location smaller
    Serial.print(myChar);
  }
}

void loop() {}