diff --git a/calc.cpp b/calc.cpp
index 00c2c4d7177c89ff39cb66935879fded5d37c3fc..c24edad2106716d5a3eedf90ac57351fe9b5187b 100644
--- a/calc.cpp
+++ b/calc.cpp
@@ -14,8 +14,8 @@ Calculator::Calculator(QWidget *parent)
     f_currentNum(""),
     f_if_currNumChangable(true)
 {
-    setMinimumSize(500, 450);
-    this->setWindowTitle("Casual calculator (standard mode)");
+    setMinimumSize(600, 600);
+    this->setWindowTitle("Casual calculator (standard)");
     MainLayout = new QGridLayout(this);
     f_BtnLayoutCasual = new QGridLayout(this);  
     f_BtnLayoutSciExtr = new QGridLayout(this); 
@@ -56,7 +56,7 @@ Calculator::Calculator(QWidget *parent)
     {
         for (int col = 0; col < 5; col++)
         {
-            f_BtnLayoutCasual->addWidget(createButton(ButtonsTxtCasual[row][col], 60, 40), row+2, col);
+            f_BtnLayoutCasual->addWidget(createButton(ButtonsTxtCasual[row][col], 50, 40), row+2, col);
         }
     }
 
@@ -64,7 +64,7 @@ Calculator::Calculator(QWidget *parent)
     {
         for (int col = 0; col < 4; col++)
         {
-            f_BtnLayoutSciExtr->addWidget(createButton(ButtonsTxtSciExtr[row][col], 60, 40), row+2, col);
+            f_BtnLayoutSciExtr->addWidget(createButton(ButtonsTxtSciExtr[row][col], 50, 40), row+2, col);
         }
     }
 
@@ -73,7 +73,7 @@ Calculator::Calculator(QWidget *parent)
     f_HBoxBtnLayout->addWidget(f_BtnLayoutSciExtrWidget);
     f_HBoxBtnLayout->addWidget(f_BtnLayoutCasualExtrWidget);
     MainLayout->addWidget(f_lcdNum, 0, 0, 1, 8, Qt::AlignmentFlag::AlignHCenter);
-    MainLayout->addWidget(createButton("Delete", 70, 50), 0, 15, Qt::AlignmentFlag::AlignCenter);
+    MainLayout->addWidget(createButton("Delete", 40, 35), 0, 8, Qt::AlignmentFlag::AlignCenter);
 
     MainLayout->addWidget(f_radioBtnCasual, 1, 0, 1, 2, Qt::AlignmentFlag::AlignCenter);
     MainLayout->addWidget(f_radioBtnSci, 1, 2, 1, 2, Qt::AlignmentFlag::AlignCenter);
@@ -82,7 +82,7 @@ Calculator::Calculator(QWidget *parent)
 
     f_BtnLayoutSciExtrWidget->hide();
     this->setLayout(MainLayout);
-    resize (500, 400);
+    resize (600, 600);
 }
 
 QPushButton* Calculator::createButton(const QString &p_str, size_t p_horz, size_t p_vert)
@@ -320,10 +320,10 @@ void Calculator::slotHideSci(bool p_is)
         this->setWindowTitle("Casual Calculator (standard mode)");
         f_BtnLayoutSciExtrWidget->hide();
 
-        setMinimumSize(500, 450);
-        resize(600, 450);
-        qDebug() << "Resize (600, 450)";
-        f_lcdNum->setMinimumSize(370,60);
+        setMinimumSize(600, 600);
+        resize(600, 600);
+        qDebug() << "Resize (600, 600)";
+        f_lcdNum->setMinimumSize(350,60);
         f_lcdNum->setDigitCount(20);
     }
 }
@@ -335,11 +335,11 @@ void Calculator::slotShowSci(bool p_is)
         this->setWindowTitle("Scientific Calculator (scientific mode)");
         f_BtnLayoutSciExtrWidget->show();
 
-        setMinimumSize(800, 450);
-        resize(800, 450);
+        setMinimumSize(1000, 600);
+        resize(1000, 600);
 
         qDebug() << "Resize (900, 450)";
-        f_lcdNum->setMinimumSize(650,60);
+        f_lcdNum->setMinimumSize(750,60);
         f_lcdNum->setDigitCount(35);
     }
 }