Update app.py

app.py

@@ -66,12 +66,12 @@ if uploaded_file is not None:
                 scale_option = st.selectbox("X Scaling Option:", 
                                             ["None", "Hz → MHz", "Hz → GHz", "mm → cm", "mm → m", 
                                              "cm → mm", "m → mm", "Frequency → Wavelength", "Wavelength → Frequency", 
-                                             "Linear → dB", "dB → Linear"], index=0)
+                                             "Linear → dB", "dB → Linear"], index=2)
                 x_min = st.number_input("Lower X-axis Limit:", value=None, format="%f")
                 x_max = st.number_input("Upper X-axis Limit:", value=None, format="%f")
-                x_step = st.number_input("X-axis Step Size:", value=1.0, format="%f")
+                x_step = st.number_input("X-axis Step Size:", value=5.0, format="%f")
                 x_font_size = st.slider("X-axis Font Size:", 8, 20, 14)
-                x_tick_position = st.selectbox("X-axis Tick Position:", ["out", "in", "inout"], index=0)
+                x_tick_position = st.selectbox("X-axis Tick Position:", ["out", "in", "inout"], index=2)
 
             with col2:
                 # Y-Axis Settings