How to set spacing in MATLAB

I want to give spacing to my plot,currently the spacing is 10,i want to change it into 15.

Note: i'm using MATLAB 2018a

function DisplaySettings_Callback(hObject, eventdata, handles)
% hObject    handle to DisplaySettings (see GCBO)function DisplaySettings_Callback(hObject, eventdata, handles)
% hObject    handle to DisplaySettings (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
prompt = {'Scaling Rate:','Spacing:','Channels to display:'};
dlg_title = 'Display Parameters---------------------------------------------------------';
num_lines = 1;
def = {num2str(handles.Scalefactor),num2str(handles.spacing),num2str(handles.dispchannels)};
options.Resize='on';
options.WindowStyle='normal';
options.Interpreter='tex';
answer = inputdlg(prompt,dlg_title,num_lines,def);
if(~isempty(answer))
    
    handles.Scalefactor = str2double(answer{1});
    handles.spacing = str2double(answer{2});
    %   handles.channels = str2double(answer{3});
    handles.dispchannels = str2double(answer{3});
    %Changed by Deepu @15/11/2021
    def = {handles.Scalefactor,handles.spacing};
    scale = handles.Scalefactor;
    % scale=1000;
    spacing = handles.spacing;
    step = (handles.channels-handles.dispchannels)+1
    %     set(handles.eeg_slider,'SliderStep',[1/step 0.3]);
    handles.plotch = [];
    %     handles.dispcol_start = 1;
    % handles.dispcol_end =  handles.dispchandles.dispchannels;
    handles.dispcol_start = 1;
    handles.dispcol_end =  handles.dispchannels;
    for i =1 : handles.channels
        %          handles.plotch(:,i)= handles.ch(:,i)+(i-1)*(-1250);
        handles.plotch(:,i)= handles.ch(:,i)*(-scale*1000)+(i-1)*(-spacing*1000000);
    end 
end
guidata(hObject, handles);
plotChanneldata(hObject, eventdata, handles);

[Adam Danz]

Spacing of what?

[Deepu S S]

spacing of plot

[Adam Danz]

Sorry, I have no idea what the goals is.